90904073 has 16 divisors (see below), whose sum is σ = 103904640. Its totient is φ = 78887424.

The previous prime is 90904003. The next prime is 90904081. The reversal of 90904073 is 37040909.

It is a happy number.

It is not a de Polignac number, because 90904073 - 2¹⁴ = 90887689 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (90904003) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15065 + ... + 20217.

It is an arithmetic number, because the mean of its divisors is an integer number (6494040).

Almost surely, 2^90904073 is an apocalyptic number.

It is an amenable number.

90904073 is a deficient number, since it is larger than the sum of its proper divisors (13000567).

90904073 is a wasteful number, since it uses less digits than its factorization.

90904073 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5248.

The product of its (nonzero) digits is 6804, while the sum is 32.

The square root of 90904073 is about 9534.3627474520. The cubic root of 90904073 is about 449.6360398647.

The spelling of 90904073 in words is "ninety million, nine hundred four thousand, seventy-three".