131177939 has 2 divisors, whose sum is σ = 131177940. Its totient is φ = 131177938.

The previous prime is 131177923. The next prime is 131177989. The reversal of 131177939 is 939771131.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 131177939 - 2⁴ = 131177923 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 131177896 and 131177905.

It is not a weakly prime, because it can be changed into another prime (131177909) 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, 65588969 + 65588970.

It is an arithmetic number, because the mean of its divisors is an integer number (65588970).

Almost surely, 2^131177939 is an apocalyptic number.

131177939 is a deficient number, since it is larger than the sum of its proper divisors (1).

131177939 is an equidigital number, since it uses as much as digits as its factorization.

131177939 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 35721, while the sum is 41.

The square root of 131177939 is about 11453.2938057137. The cubic root of 131177939 is about 508.1051549836.

The spelling of 131177939 in words is "one hundred thirty-one million, one hundred seventy-seven thousand, nine hundred thirty-nine".