1311662869 has 6 divisors (see below), whose sum is σ = 1441745270. Its totient is φ = 1192420680.

The previous prime is 1311662843. The next prime is 1311662879. The reversal of 1311662869 is 9682661131.

It can be written as a sum of positive squares in only one way, i.e., 1284362244 + 27300625 = 35838^2 + 5225^2 .

It is not a de Polignac number, because 1311662869 - 2⁷ = 1311662741 is a prime.

It is a super-2 number, since 2×1311662869² = 3440918963826622322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1311662879) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 5419974 + ... + 5420215.

Almost surely, 2^1311662869 is an apocalyptic number.

It is an amenable number.

1311662869 is a deficient number, since it is larger than the sum of its proper divisors (130082401).

1311662869 is a wasteful number, since it uses less digits than its factorization.

1311662869 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10840211 (or 10840200 counting only the distinct ones).

The product of its digits is 93312, while the sum is 43.

The square root of 1311662869 is about 36216.8865172035. The cubic root of 1311662869 is about 1094.6469588786.

The spelling of 1311662869 in words is "one billion, three hundred eleven million, six hundred sixty-two thousand, eight hundred sixty-nine".