98985191281 has 4 divisors (see below), whose sum is σ = 98985971700. Its totient is φ = 98984410864.

The previous prime is 98985191269. The next prime is 98985191293. The reversal of 98985191281 is 18219158989.

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.

It is an interprime number because it is at equal distance from previous prime (98985191269) and next prime (98985191293).

It can be written as a sum of positive squares in 2 ways, for example, as 58590623025 + 40394568256 = 242055^2 + 200984^2 .

It is a cyclic number.

It is not a de Polignac number, because 98985191281 - 2⁷ = 98985191153 is a prime.

It is a super-2 number, since 2×98985191281² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (98985191581) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 151126 + ... + 469903.

It is an arithmetic number, because the mean of its divisors is an integer number (24746492925).

Almost surely, 2^98985191281 is an apocalyptic number.

It is an amenable number.

98985191281 is a deficient number, since it is larger than the sum of its proper divisors (780419).

98985191281 is a wasteful number, since it uses less digits than its factorization.

98985191281 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 780418.

The product of its digits is 3732480, while the sum is 61.

The spelling of 98985191281 in words is "ninety-eight billion, nine hundred eighty-five million, one hundred ninety-one thousand, two hundred eighty-one".