131023299969 has 18 divisors (see below), whose sum is σ = 189529731846. Its totient is φ = 87222654720.

The previous prime is 131023299949. The next prime is 131023299973. The reversal of 131023299969 is 969992320131.

131023299969 is a `hidden beast` number, since 1 + 310 + 232 + 9 + 9 + 96 + 9 = 666.

It can be written as a sum of positive squares in 3 ways, for example, as 8411274369 + 122612025600 = 91713^2 + 350160^2 .

It is not a de Polignac number, because 131023299969 - 2¹⁷ = 131023168897 is a prime.

It is a super-2 number, since 2×131023299969² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (131023299949) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 4509649 + ... + 4538609.

It is an arithmetic number, because the mean of its divisors is an integer number (10529429547).

Almost surely, 2^131023299969 is an apocalyptic number.

It is an amenable number.

131023299969 is a deficient number, since it is larger than the sum of its proper divisors (58506431877).

131023299969 is an frugal number, since it uses more digits than its factorization.

131023299969 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30385 (or 29673 counting only the distinct ones).

The product of its (nonzero) digits is 1417176, while the sum is 54.

The spelling of 131023299969 in words is "one hundred thirty-one billion, twenty-three million, two hundred ninety-nine thousand, nine hundred sixty-nine".