90521339 has 12 divisors (see below), whose sum is σ = 96407640. Its totient is φ = 84758400.

The previous prime is 90521323. The next prime is 90521341. The reversal of 90521339 is 93312509.

It is not a de Polignac number, because 90521339 - 2⁴ = 90521323 is a prime.

It is a super-2 number, since 2×90521339² = 16388225628705842, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (90521359) 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, 225539 + ... + 225939.

It is an arithmetic number, because the mean of its divisors is an integer number (8033970).

Almost surely, 2^90521339 is an apocalyptic number.

90521339 is a deficient number, since it is larger than the sum of its proper divisors (5886301).

90521339 is a wasteful number, since it uses less digits than its factorization.

90521339 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 638 (or 529 counting only the distinct ones).

The product of its (nonzero) digits is 7290, while the sum is 32.

The square root of 90521339 is about 9514.2702820553. The cubic root of 90521339 is about 449.0041170053.

The spelling of 90521339 in words is "ninety million, five hundred twenty-one thousand, three hundred thirty-nine".