90504739 has 12 divisors (see below), whose sum is σ = 99477336. Its totient is φ = 82285632.

The previous prime is 90504731. The next prime is 90504749. The reversal of 90504739 is 93740509.

It is not a de Polignac number, because 90504739 - 2³ = 90504731 is a prime.

It is a super-2 number, since 2×90504739² = 16382215562916242, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 90504698 and 90504707.

It is not an unprimeable number, because it can be changed into a prime (90504731) 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, 7327 + ... + 15319.

It is an arithmetic number, because the mean of its divisors is an integer number (8289778).

Almost surely, 2^90504739 is an apocalyptic number.

90504739 is a deficient number, since it is larger than the sum of its proper divisors (8972597).

90504739 is a wasteful number, since it uses less digits than its factorization.

90504739 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8086 (or 8073 counting only the distinct ones).

The product of its (nonzero) digits is 34020, while the sum is 37.

The square root of 90504739 is about 9513.3978682698. The cubic root of 90504739 is about 448.9766688769.

The spelling of 90504739 in words is "ninety million, five hundred four thousand, seven hundred thirty-nine".