90696639 has 12 divisors (see below), whose sum is σ = 132922328. Its totient is φ = 54967440.

The previous prime is 90696631. The next prime is 90696701. The reversal of 90696639 is 93669609.

It is not a de Polignac number, because 90696639 - 2³ = 90696631 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90696631) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 124564 + ... + 125289.

Almost surely, 2^90696639 is an apocalyptic number.

90696639 is a deficient number, since it is larger than the sum of its proper divisors (42225689).

90696639 is a wasteful number, since it uses less digits than its factorization.

90696639 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 249878 (or 249867 counting only the distinct ones).

The product of its (nonzero) digits is 472392, while the sum is 48.

The square root of 90696639 is about 9523.4783036452. The cubic root of 90696639 is about 449.2937712387.

The spelling of 90696639 in words is "ninety million, six hundred ninety-six thousand, six hundred thirty-nine".