990573057 has 20 divisors (see below), whose sum is σ = 1483483716. Its totient is φ = 658713600.

The previous prime is 990573047. The next prime is 990573071. The reversal of 990573057 is 750375099.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 901440576 + 89132481 = 30024^2 + 9441^2 .

It is not a de Polignac number, because 990573057 - 2⁴ = 990573041 is a prime.

It is not an unprimeable number, because it can be changed into a prime (990573047) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 17233 + ... + 47729.

Almost surely, 2^990573057 is an apocalyptic number.

It is an amenable number.

990573057 is a deficient number, since it is larger than the sum of its proper divisors (492910659).

990573057 is a wasteful number, since it uses less digits than its factorization.

990573057 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30910 (or 30901 counting only the distinct ones).

The product of its (nonzero) digits is 297675, while the sum is 45.

The square root of 990573057 is about 31473.3706011924. The cubic root of 990573057 is about 996.8477594873.

The spelling of 990573057 in words is "nine hundred ninety million, five hundred seventy-three thousand, fifty-seven".