98288089981 has 4 divisors (see below), whose sum is σ = 98288783964. Its totient is φ = 98287396000.

The previous prime is 98288089927. The next prime is 98288089987. The reversal of 98288089981 is 18998088289.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 18998088289 = 107 ⋅177552227.

It can be written as a sum of positive squares in 2 ways, for example, as 67930603225 + 30357486756 = 260635^2 + 174234^2 .

It is a 3-Lehmer number, since φ(98288089981) divides (98288089981-1)³.

It is a cyclic number.

It is not a de Polignac number, because 98288089981 - 2⁹ = 98288089469 is a prime.

It is a super-2 number, since 2×98288089981² (a number of 23 digits) contains 22 as substring.

It is a deceptive number, since it divides R_98288089980.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 98288089981.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (98288089987) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 49570 + ... + 446131.

It is an arithmetic number, because the mean of its divisors is an integer number (24572195991).

Almost surely, 2^98288089981 is an apocalyptic number.

98288089981 is the 198281-st heptagonal number.

It is an amenable number.

98288089981 is a deficient number, since it is larger than the sum of its proper divisors (693983).

98288089981 is a wasteful number, since it uses less digits than its factorization.

98288089981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 693982.

The product of its (nonzero) digits is 47775744, while the sum is 70.

The spelling of 98288089981 in words is "ninety-eight billion, two hundred eighty-eight million, eighty-nine thousand, nine hundred eighty-one".