131269639897 has 6 divisors (see below), whose sum is σ = 144288116714. Its totient is φ = 119336036160.

The previous prime is 131269639873. The next prime is 131269639939. The reversal of 131269639897 is 798936962131.

It can be written as a sum of positive squares in only one way, i.e., 89942409216 + 41327230681 = 299904^2 + 203291^2 .

It is a de Polignac number, because none of the positive numbers 2^k-131269639897 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (131269639807) 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, 542436408 + ... + 542436649.

Almost surely, 2^131269639897 is an apocalyptic number.

It is an amenable number.

131269639897 is a deficient number, since it is larger than the sum of its proper divisors (13018476817).

131269639897 is a wasteful number, since it uses less digits than its factorization.

131269639897 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1084873079 (or 1084873068 counting only the distinct ones).

The product of its digits is 26453952, while the sum is 64.

The spelling of 131269639897 in words is "one hundred thirty-one billion, two hundred sixty-nine million, six hundred thirty-nine thousand, eight hundred ninety-seven".