90613825 has 12 divisors (see below), whose sum is σ = 118971180. Its totient is φ = 68226560.

The previous prime is 90613823. The next prime is 90613829. The reversal of 90613825 is 52831609.

It can be written as a sum of positive squares in 6 ways, for example, as 12609601 + 78004224 = 3551^2 + 8832^2 .

It is not a de Polignac number, because 90613825 - 2¹ = 90613823 is a prime.

It is a super-2 number, since 2×90613825² = 16421730562261250, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (90613823) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 106180 + ... + 107029.

It is an arithmetic number, because the mean of its divisors is an integer number (9914265).

Almost surely, 2^90613825 is an apocalyptic number.

It is an amenable number.

90613825 is a deficient number, since it is larger than the sum of its proper divisors (28357355).

90613825 is a wasteful number, since it uses less digits than its factorization.

90613825 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 213236 (or 213231 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 34.

The square root of 90613825 is about 9519.1294244800. The cubic root of 90613825 is about 449.1569813672.

The spelling of 90613825 in words is "ninety million, six hundred thirteen thousand, eight hundred twenty-five".