131555923 has 2 divisors, whose sum is σ = 131555924. Its totient is φ = 131555922.

The previous prime is 131555903. The next prime is 131555933. The reversal of 131555923 is 329555131.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 131555923 - 2⁵ = 131555891 is a prime.

It is not a weakly prime, because it can be changed into another prime (131555903) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65777961 + 65777962.

It is an arithmetic number, because the mean of its divisors is an integer number (65777962).

Almost surely, 2^131555923 is an apocalyptic number.

131555923 is a deficient number, since it is larger than the sum of its proper divisors (1).

131555923 is an equidigital number, since it uses as much as digits as its factorization.

131555923 is an evil number, because the sum of its binary digits is even.

The product of its digits is 20250, while the sum is 34.

The square root of 131555923 is about 11469.7830406682. The cubic root of 131555923 is about 508.5927152351.

The spelling of 131555923 in words is "one hundred thirty-one million, five hundred fifty-five thousand, nine hundred twenty-three".