131973949 has 2 divisors, whose sum is σ = 131973950. Its totient is φ = 131973948.

The previous prime is 131973911. The next prime is 131973953. The reversal of 131973949 is 949379131.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 82482724 + 49491225 = 9082^2 + 7035^2 .

It is an emirp because it is prime and its reverse (949379131) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 131973949 - 2⁹ = 131973437 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 131973899 and 131973908.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (131973749) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65986974 + 65986975.

It is an arithmetic number, because the mean of its divisors is an integer number (65986975).

Almost surely, 2^131973949 is an apocalyptic number.

It is an amenable number.

131973949 is a deficient number, since it is larger than the sum of its proper divisors (1).

131973949 is an equidigital number, since it uses as much as digits as its factorization.

131973949 is an evil number, because the sum of its binary digits is even.

The product of its digits is 183708, while the sum is 46.

The square root of 131973949 is about 11487.9915128799. The cubic root of 131973949 is about 509.1308392063.

The spelling of 131973949 in words is "one hundred thirty-one million, nine hundred seventy-three thousand, nine hundred forty-nine".