91983976 has 24 divisors (see below), whose sum is σ = 200629170. Its totient is φ = 39421536.

The previous prime is 91983967. The next prime is 91983977. The reversal of 91983976 is 67938919.

It can be written as a sum of positive squares in only one way, i.e., 91968100 + 15876 = 9590^2 + 126^2 .

It is a super-2 number, since 2×91983976² = 16922103681537152, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (91983977) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 116935 + ... + 117718.

Almost surely, 2^91983976 is an apocalyptic number.

It is an amenable number.

91983976 is an abundant number, since it is smaller than the sum of its proper divisors (108645194).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

91983976 is a wasteful number, since it uses less digits than its factorization.

91983976 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 234673 (or 234662 counting only the distinct ones).

The product of its digits is 734832, while the sum is 52.

The square root of 91983976 is about 9590.8277015073. The cubic root of 91983976 is about 451.4095325823.

The spelling of 91983976 in words is "ninety-one million, nine hundred eighty-three thousand, nine hundred seventy-six".