90515207 has 4 divisors (see below), whose sum is σ = 90611736. Its totient is φ = 90418680.

The previous prime is 90515179. The next prime is 90515219. The reversal of 90515207 is 70251509.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 90515207 - 2¹⁸ = 90253063 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 90515207.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90515237) 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, 46844 + ... + 48737.

It is an arithmetic number, because the mean of its divisors is an integer number (22652934).

Almost surely, 2^90515207 is an apocalyptic number.

90515207 is a deficient number, since it is larger than the sum of its proper divisors (96529).

90515207 is an equidigital number, since it uses as much as digits as its factorization.

90515207 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 96528.

The product of its (nonzero) digits is 3150, while the sum is 29.

The square root of 90515207 is about 9513.9480238227. The cubic root of 90515207 is about 448.9939781237.

The spelling of 90515207 in words is "ninety million, five hundred fifteen thousand, two hundred seven".