990689059 has 16 divisors (see below), whose sum is σ = 1071279648. Its totient is φ = 912771072.

The previous prime is 990688973. The next prime is 990689087. The reversal of 990689059 is 950986099.

It is not a de Polignac number, because 990689059 - 2⁹ = 990688547 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (990689159) 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, 167104 + ... + 172930.

It is an arithmetic number, because the mean of its divisors is an integer number (66954978).

Almost surely, 2^990689059 is an apocalyptic number.

990689059 is a deficient number, since it is larger than the sum of its proper divisors (80590589).

990689059 is a wasteful number, since it uses less digits than its factorization.

990689059 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6054.

The product of its (nonzero) digits is 1574640, while the sum is 55.

The square root of 990689059 is about 31475.2134067428. The cubic root of 990689059 is about 996.8866702368.

The spelling of 990689059 in words is "nine hundred ninety million, six hundred eighty-nine thousand, fifty-nine".