91813432 has 16 divisors (see below), whose sum is σ = 176349600. Its totient is φ = 44786880.

The previous prime is 91813429. The next prime is 91813433. The reversal of 91813432 is 23431819.

It is a junction number, because it is equal to n+sod(n) for n = 91813394 and 91813403.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91813433) 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, 139632 + ... + 140287.

It is an arithmetic number, because the mean of its divisors is an integer number (11021850).

Almost surely, 2^91813432 is an apocalyptic number.

It is an amenable number.

91813432 is a deficient number, since it is larger than the sum of its proper divisors (84536168).

91813432 is a wasteful number, since it uses less digits than its factorization.

91813432 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 279966 (or 279962 counting only the distinct ones).

The product of its digits is 5184, while the sum is 31.

The square root of 91813432 is about 9581.9325816873. The cubic root of 91813432 is about 451.1303795595.

The spelling of 91813432 in words is "ninety-one million, eight hundred thirteen thousand, four hundred thirty-two".