131389569 has 6 divisors (see below), whose sum is σ = 189784946. Its totient is φ = 87593040.

The previous prime is 131389567. The next prime is 131389589. The reversal of 131389569 is 965983131.

131389569 is a `hidden beast` number, since 1 + 3 + 1 + 3 + 89 + 569 = 666.

It can be written as a sum of positive squares in only one way, i.e., 129686544 + 1703025 = 11388^2 + 1305^2 .

It is not a de Polignac number, because 131389569 - 2¹ = 131389567 is a prime.

It is a super-2 number, since 2×131389569² = 34526437684011522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (131389567) by changing a digit.

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 5 ways as a sum of consecutive naturals, for example, 7299412 + ... + 7299429.

Almost surely, 2^131389569 is an apocalyptic number.

It is an amenable number.

131389569 is a deficient number, since it is larger than the sum of its proper divisors (58395377).

131389569 is a wasteful number, since it uses less digits than its factorization.

131389569 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14598847 (or 14598844 counting only the distinct ones).

The product of its digits is 174960, while the sum is 45.

The square root of 131389569 is about 11462.5289094510. The cubic root of 131389569 is about 508.3782510041.

The spelling of 131389569 in words is "one hundred thirty-one million, three hundred eighty-nine thousand, five hundred sixty-nine".