1079990665 has 16 divisors (see below), whose sum is σ = 1418565456. Its totient is φ = 784454400.

The previous prime is 1079990657. The next prime is 1079990683. The reversal of 1079990665 is 5660999701.

It can be written as a sum of positive squares in 8 ways, for example, as 387932416 + 692058249 = 19696^2 + 26307^2 .

It is not a de Polignac number, because 1079990665 - 2³ = 1079990657 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 132226 + ... + 140155.

It is an arithmetic number, because the mean of its divisors is an integer number (88660341).

Almost surely, 2^1079990665 is an apocalyptic number.

It is an amenable number.

1079990665 is a deficient number, since it is larger than the sum of its proper divisors (338574791).

1079990665 is a wasteful number, since it uses less digits than its factorization.

1079990665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 272460.

The product of its (nonzero) digits is 918540, while the sum is 52.

The square root of 1079990665 is about 32863.2114225010. The cubic root of 1079990665 is about 1025.9826119557.

The spelling of 1079990665 in words is "one billion, seventy-nine million, nine hundred ninety thousand, six hundred sixty-five".