91612413 has 6 divisors (see below), whose sum is σ = 132329054. Its totient is φ = 61074936.

The previous prime is 91612387. The next prime is 91612459. The reversal of 91612413 is 31421619.

91612413 is a `hidden beast` number, since 9 + 1 + 612 + 41 + 3 = 666.

It can be written as a sum of positive squares in only one way, i.e., 91355364 + 257049 = 9558^2 + 507^2 .

It is not a de Polignac number, because 91612413 - 2⁶ = 91612349 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91612513) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 5089570 + ... + 5089587.

Almost surely, 2^91612413 is an apocalyptic number.

It is an amenable number.

91612413 is a deficient number, since it is larger than the sum of its proper divisors (40716641).

91612413 is a wasteful number, since it uses less digits than its factorization.

91612413 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10179163 (or 10179160 counting only the distinct ones).

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

The square root of 91612413 is about 9571.4373528744. The cubic root of 91612413 is about 450.8008996575.

The spelling of 91612413 in words is "ninety-one million, six hundred twelve thousand, four hundred thirteen".