91613412 has 36 divisors (see below), whose sum is σ = 252632016. Its totient is φ = 27761520.

The previous prime is 91613411. The next prime is 91613413. The reversal of 91613412 is 21431619.

91613412 is a `hidden beast` number, since 9 + 1 + 613 + 41 + 2 = 666.

It is an interprime number because it is at equal distance from previous prime (91613411) and next prime (91613413).

It is a tau number, because it is divible by the number of its divisors (36).

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

It is a nude number because it is divisible by every one of its digits.

It is not an unprimeable number, because it can be changed into a prime (91613411) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 115278 + ... + 116069.

It is an arithmetic number, because the mean of its divisors is an integer number (7017556).

Almost surely, 2^91613412 is an apocalyptic number.

It is an amenable number.

91613412 is an abundant number, since it is smaller than the sum of its proper divisors (161018604).

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

91613412 is a wasteful number, since it uses less digits than its factorization.

91613412 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 231368 (or 231363 counting only the distinct ones).

The product of its digits is 1296, while the sum is 27.

The square root of 91613412 is about 9571.4895392515. The cubic root of 91613412 is about 450.8025382581.

The spelling of 91613412 in words is "ninety-one million, six hundred thirteen thousand, four hundred twelve".