90615913 has 4 divisors (see below), whose sum is σ = 90638080. Its totient is φ = 90593748.

The previous prime is 90615901. The next prime is 90615919. The reversal of 90615913 is 31951609.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 90615913 - 2⁵ = 90615881 is a prime.

It is a super-2 number, since 2×90615913² = 16422487377647138, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (90615919) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 2973 + ... + 13786.

It is an arithmetic number, because the mean of its divisors is an integer number (22659520).

Almost surely, 2^90615913 is an apocalyptic number.

It is an amenable number.

90615913 is a deficient number, since it is larger than the sum of its proper divisors (22167).

90615913 is a wasteful number, since it uses less digits than its factorization.

90615913 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22166.

The product of its (nonzero) digits is 7290, while the sum is 34.

The square root of 90615913 is about 9519.2390977431. The cubic root of 90615913 is about 449.1604312917.

The spelling of 90615913 in words is "ninety million, six hundred fifteen thousand, nine hundred thirteen".