90904315 has 4 divisors (see below), whose sum is σ = 109085184. Its totient is φ = 72723448.

The previous prime is 90904313. The next prime is 90904391. The reversal of 90904315 is 51340909.

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 90904315 - 2¹ = 90904313 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (90904313) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9090427 + ... + 9090436.

It is an arithmetic number, because the mean of its divisors is an integer number (27271296).

Almost surely, 2^90904315 is an apocalyptic number.

90904315 is a deficient number, since it is larger than the sum of its proper divisors (18180869).

90904315 is a wasteful number, since it uses less digits than its factorization.

90904315 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18180868.

The product of its (nonzero) digits is 4860, while the sum is 31.

The square root of 90904315 is about 9534.3754383808. The cubic root of 90904315 is about 449.6364388634.

It can be divided in two parts, 90904 and 315, that added together give a palindrome (91219).

The spelling of 90904315 in words is "ninety million, nine hundred four thousand, three hundred fifteen".