90939635 has 4 divisors (see below), whose sum is σ = 109127568. Its totient is φ = 72751704.

The previous prime is 90939619. The next prime is 90939637. The reversal of 90939635 is 53693909.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 53693909 = 73 ⋅735533.

It is a cyclic number.

It is not a de Polignac number, because 90939635 - 2⁴ = 90939619 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (90939637) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9093959 + ... + 9093968.

It is an arithmetic number, because the mean of its divisors is an integer number (27281892).

Almost surely, 2^90939635 is an apocalyptic number.

90939635 is a deficient number, since it is larger than the sum of its proper divisors (18187933).

90939635 is a wasteful number, since it uses less digits than its factorization.

90939635 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18187932.

The product of its (nonzero) digits is 196830, while the sum is 44.

The square root of 90939635 is about 9536.2275035781. The cubic root of 90939635 is about 449.6946652987.

The spelling of 90939635 in words is "ninety million, nine hundred thirty-nine thousand, six hundred thirty-five".