990576789 has 16 divisors (see below), whose sum is σ = 1337214528. Its totient is φ = 652200192.

The previous prime is 990576781. The next prime is 990576803. The reversal of 990576789 is 987675099.

It is not a de Polignac number, because 990576789 - 2³ = 990576781 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (990576781) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 103599 + ... + 112755.

It is an arithmetic number, because the mean of its divisors is an integer number (83575908).

Almost surely, 2^990576789 is an apocalyptic number.

It is an amenable number.

990576789 is a deficient number, since it is larger than the sum of its proper divisors (346637739).

990576789 is a wasteful number, since it uses less digits than its factorization.

990576789 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9604.

The product of its (nonzero) digits is 8573040, while the sum is 60.

The square root of 990576789 is about 31473.4298893527. The cubic root of 990576789 is about 996.8490113657.

The spelling of 990576789 in words is "nine hundred ninety million, five hundred seventy-six thousand, seven hundred eighty-nine".