91616319 has 8 divisors (see below), whose sum is σ = 135727920. Its totient is φ = 61077528.

The previous prime is 91616311. The next prime is 91616323. The reversal of 91616319 is 91361619.

91616319 is a `hidden beast` number, since 9 + 1 + 616 + 31 + 9 = 666.

It is not a de Polignac number, because 91616319 - 2³ = 91616311 is a prime.

It is a super-2 number, since 2×91616319² = 16787099814219522, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91616311) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1696572 + ... + 1696625.

It is an arithmetic number, because the mean of its divisors is an integer number (16965990).

Almost surely, 2^91616319 is an apocalyptic number.

91616319 is a deficient number, since it is larger than the sum of its proper divisors (44111601).

91616319 is a wasteful number, since it uses less digits than its factorization.

91616319 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3393206 (or 3393200 counting only the distinct ones).

The product of its digits is 8748, while the sum is 36.

The square root of 91616319 is about 9571.6413952885. The cubic root of 91616319 is about 450.8073063704.

The spelling of 91616319 in words is "ninety-one million, six hundred sixteen thousand, three hundred nineteen".