990575 has 6 divisors (see below), whose sum is σ = 1228344. Its totient is φ = 792440.

The previous prime is 990559. The next prime is 990589. The reversal of 990575 is 575099.

It is not a de Polignac number, because 990575 - 2⁴ = 990559 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 19787 + ... + 19836.

It is an arithmetic number, because the mean of its divisors is an integer number (204724).

2⁹⁹⁰⁵⁷⁵ is an apocalyptic number.

990575 is a deficient number, since it is larger than the sum of its proper divisors (237769).

990575 is a wasteful number, since it uses less digits than its factorization.

990575 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39633 (or 39628 counting only the distinct ones).

The product of its (nonzero) digits is 14175, while the sum is 35.

The square root of 990575 is about 995.2763435348. The cubic root of 990575 is about 99.6848411256.

The spelling of 990575 in words is "nine hundred ninety thousand, five hundred seventy-five".