90299515 has 4 divisors (see below), whose sum is σ = 108359424. Its totient is φ = 72239608.

The previous prime is 90299491. The next prime is 90299537. The reversal of 90299515 is 51599209.

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 90299515 - 2⁵ = 90299483 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9029947 + ... + 9029956.

It is an arithmetic number, because the mean of its divisors is an integer number (27089856).

Almost surely, 2^90299515 is an apocalyptic number.

90299515 is a deficient number, since it is larger than the sum of its proper divisors (18059909).

90299515 is a wasteful number, since it uses less digits than its factorization.

90299515 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18059908.

The product of its (nonzero) digits is 36450, while the sum is 40.

The square root of 90299515 is about 9502.6056952817. The cubic root of 90299515 is about 448.6370530683.

The spelling of 90299515 in words is "ninety million, two hundred ninety-nine thousand, five hundred fifteen".