131434879661 has 6 divisors (see below), whose sum is σ = 133037518350. Its totient is φ = 129851320088.

The previous prime is 131434879643. The next prime is 131434879669. The reversal of 131434879661 is 166978434131.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 102483857161 + 28951022500 = 320131^2 + 170150^2 .

It is not a de Polignac number, because 131434879661 - 2³⁴ = 114255010477 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131434879669) 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, 9532586 + ... + 9546363.

It is an arithmetic number, because the mean of its divisors is an integer number (22172919725).

Almost surely, 2^131434879661 is an apocalyptic number.

It is an amenable number.

131434879661 is a deficient number, since it is larger than the sum of its proper divisors (1602638689).

131434879661 is an frugal number, since it uses more digits than its factorization.

131434879661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19079115 (or 19079032 counting only the distinct ones).

The product of its digits is 2612736, while the sum is 53.

The spelling of 131434879661 in words is "one hundred thirty-one billion, four hundred thirty-four million, eight hundred seventy-nine thousand, six hundred sixty-one".