2897263665 has 12 divisors (see below), whose sum is σ = 5021923764. Its totient is φ = 1545207264.

The previous prime is 2897263657. The next prime is 2897263667. The reversal of 2897263665 is 5663627982.

It can be written as a sum of positive squares in 2 ways, for example, as 971194896 + 1926068769 = 31164^2 + 43887^2 .

It is not a de Polignac number, because 2897263665 - 2³ = 2897263657 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2897263667) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 32191774 + ... + 32191863.

It is an arithmetic number, because the mean of its divisors is an integer number (418493647).

Almost surely, 2^2897263665 is an apocalyptic number.

It is an amenable number.

2897263665 is a deficient number, since it is larger than the sum of its proper divisors (2124660099).

2897263665 is a wasteful number, since it uses less digits than its factorization.

2897263665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64383648 (or 64383645 counting only the distinct ones).

The product of its digits is 6531840, while the sum is 54.

The square root of 2897263665 is about 53826.2358427561. The cubic root of 2897263665 is about 1425.5944851054.

The spelling of 2897263665 in words is "two billion, eight hundred ninety-seven million, two hundred sixty-three thousand, six hundred sixty-five".