990519865 has 16 divisors (see below), whose sum is σ = 1212164352. Its totient is φ = 776876544.

The previous prime is 990519833. The next prime is 990519899. The reversal of 990519865 is 568915099.

It is a cyclic number.

It is not a de Polignac number, because 990519865 - 2⁵ = 990519833 is a prime.

It is a super-2 number, since 2×990519865² = 1962259205919236450, which contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 42352 + ... + 61438.

It is an arithmetic number, because the mean of its divisors is an integer number (75760272).

Almost surely, 2^990519865 is an apocalyptic number.

It is an amenable number.

990519865 is a deficient number, since it is larger than the sum of its proper divisors (221644487).

990519865 is a wasteful number, since it uses less digits than its factorization.

990519865 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19296.

The product of its (nonzero) digits is 874800, while the sum is 52.

The square root of 990519865 is about 31472.5255580165. The cubic root of 990519865 is about 996.8299161878.

The spelling of 990519865 in words is "nine hundred ninety million, five hundred nineteen thousand, eight hundred sixty-five".