131974538789 has 2 divisors, whose sum is σ = 131974538790. Its totient is φ = 131974538788.

The previous prime is 131974538779. The next prime is 131974538807. The reversal of 131974538789 is 987835479131.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 72994530625 + 58980008164 = 270175^2 + 242858^2 .

It is an emirp because it is prime and its reverse (987835479131) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-131974538789 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (131974538779) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65987269394 + 65987269395.

It is an arithmetic number, because the mean of its divisors is an integer number (65987269395).

Almost surely, 2^131974538789 is an apocalyptic number.

It is an amenable number.

131974538789 is a deficient number, since it is larger than the sum of its proper divisors (1).

131974538789 is an equidigital number, since it uses as much as digits as its factorization.

131974538789 is an evil number, because the sum of its binary digits is even.

The product of its digits is 45722880, while the sum is 65.

The spelling of 131974538789 in words is "one hundred thirty-one billion, nine hundred seventy-four million, five hundred thirty-eight thousand, seven hundred eighty-nine".