91914665 has 16 divisors (see below), whose sum is σ = 118393488. Its totient is φ = 68253696.

The previous prime is 91914653. The next prime is 91914671. The reversal of 91914665 is 56641919.

It can be written as a sum of positive squares in 8 ways, for example, as 4096 + 91910569 = 64^2 + 9587^2 .

It is a cyclic number.

It is not a de Polignac number, because 91914665 - 2⁴ = 91914649 is a prime.

It is a Duffinian number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 1202 + ... + 13611.

It is an arithmetic number, because the mean of its divisors is an integer number (7399593).

Almost surely, 2^91914665 is an apocalyptic number.

It is an amenable number.

91914665 is a deficient number, since it is larger than the sum of its proper divisors (26478823).

91914665 is a wasteful number, since it uses less digits than its factorization.

91914665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14908.

The product of its digits is 58320, while the sum is 41.

The square root of 91914665 is about 9587.2136202340. The cubic root of 91914665 is about 451.2961233078.

The spelling of 91914665 in words is "ninety-one million, nine hundred fourteen thousand, six hundred sixty-five".