990594531 has 12 divisors (see below), whose sum is σ = 1452215752. Its totient is φ = 650539296.

The previous prime is 990594511. The next prime is 990594581. The reversal of 990594531 is 135495099.

It is a happy number.

990594531 is a `hidden beast` number, since 9 + 9 + 0 + 594 + 53 + 1 = 666.

It is not a de Polignac number, because 990594531 - 2⁶ = 990594467 is a prime.

It is a super-2 number, since 2×990594531² = 1962555049694219922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (990594511) 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, 820786 + ... + 821991.

Almost surely, 2^990594531 is an apocalyptic number.

990594531 is a deficient number, since it is larger than the sum of its proper divisors (461621221).

990594531 is a wasteful number, since it uses less digits than its factorization.

990594531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1642850 (or 1642847 counting only the distinct ones).

The product of its (nonzero) digits is 218700, while the sum is 45.

The square root of 990594531 is about 31473.7117448832. The cubic root of 990594531 is about 996.8549627770.

The spelling of 990594531 in words is "nine hundred ninety million, five hundred ninety-four thousand, five hundred thirty-one".