131905867 has 2 divisors, whose sum is σ = 131905868. Its totient is φ = 131905866.

The previous prime is 131905861. The next prime is 131905871. The reversal of 131905867 is 768509131.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 131905867 - 2²³ = 123517259 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (131905861) 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, 65952933 + 65952934.

It is an arithmetic number, because the mean of its divisors is an integer number (65952934).

Almost surely, 2^131905867 is an apocalyptic number.

131905867 is a deficient number, since it is larger than the sum of its proper divisors (1).

131905867 is an equidigital number, since it uses as much as digits as its factorization.

131905867 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 45360, while the sum is 40.

The square root of 131905867 is about 11485.0279494653. The cubic root of 131905867 is about 509.0432749350.

The spelling of 131905867 in words is "one hundred thirty-one million, nine hundred five thousand, eight hundred sixty-seven".