98291981 has 4 divisors (see below), whose sum is σ = 98350752. Its totient is φ = 98233212.

The previous prime is 98291969. The next prime is 98291987. The reversal of 98291981 is 18919289.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-98291981 is a prime.

It is a super-2 number, since 2×98291981² = 19322627057808722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (98291987) 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, 26801 + ... + 30246.

It is an arithmetic number, because the mean of its divisors is an integer number (24587688).

Almost surely, 2^98291981 is an apocalyptic number.

It is an amenable number.

98291981 is a deficient number, since it is larger than the sum of its proper divisors (58771).

98291981 is a wasteful number, since it uses less digits than its factorization.

98291981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58770.

The product of its digits is 93312, while the sum is 47.

The square root of 98291981 is about 9914.2312359557. The cubic root of 98291981 is about 461.5010527066.

The spelling of 98291981 in words is "ninety-eight million, two hundred ninety-one thousand, nine hundred eighty-one".