90187715 has 16 divisors (see below), whose sum is σ = 115069248. Its totient is φ = 67706496.

The previous prime is 90187687. The next prime is 90187817. The reversal of 90187715 is 51778109.

It is a cyclic number.

It is not a de Polignac number, because 90187715 - 2²⁰ = 89139139 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1304 + ... + 13493.

It is an arithmetic number, because the mean of its divisors is an integer number (7191828).

Almost surely, 2^90187715 is an apocalyptic number.

90187715 is a deficient number, since it is larger than the sum of its proper divisors (24881533).

90187715 is a wasteful number, since it uses less digits than its factorization.

90187715 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14878.

The product of its (nonzero) digits is 17640, while the sum is 38.

The square root of 90187715 is about 9496.7212763143. The cubic root of 90187715 is about 448.4518238089.

The spelling of 90187715 in words is "ninety million, one hundred eighty-seven thousand, seven hundred fifteen".