131169877 has 2 divisors, whose sum is σ = 131169878. Its totient is φ = 131169876.

The previous prime is 131169833. The next prime is 131169887. The reversal of 131169877 is 778961131.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 79459396 + 51710481 = 8914^2 + 7191^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-131169877 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (131169827) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65584938 + 65584939.

It is an arithmetic number, because the mean of its divisors is an integer number (65584939).

Almost surely, 2^131169877 is an apocalyptic number.

It is an amenable number.

131169877 is a deficient number, since it is larger than the sum of its proper divisors (1).

131169877 is an equidigital number, since it uses as much as digits as its factorization.

131169877 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 63504, while the sum is 43.

The square root of 131169877 is about 11452.9418491495. The cubic root of 131169877 is about 508.0947456427.

The spelling of 131169877 in words is "one hundred thirty-one million, one hundred sixty-nine thousand, eight hundred seventy-seven".