91982331 has 16 divisors (see below), whose sum is σ = 155737600. Its totient is φ = 52561224.

The previous prime is 91982321. The next prime is 91982347. The reversal of 91982331 is 13328919.

It is not a de Polignac number, because 91982331 - 2⁵ = 91982299 is a prime.

It is a super-2 number, since 2×91982331² = 16921498432387122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (91982321) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 243151 + ... + 243528.

It is an arithmetic number, because the mean of its divisors is an integer number (9733600).

Almost surely, 2^91982331 is an apocalyptic number.

91982331 is a deficient number, since it is larger than the sum of its proper divisors (63755269).

91982331 is a wasteful number, since it uses less digits than its factorization.

91982331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 486695 (or 486689 counting only the distinct ones).

The product of its digits is 11664, while the sum is 36.

The square root of 91982331 is about 9590.7419421023. The cubic root of 91982331 is about 451.4068416313.

The spelling of 91982331 in words is "ninety-one million, nine hundred eighty-two thousand, three hundred thirty-one".