131956997 has 2 divisors, whose sum is σ = 131956998. Its totient is φ = 131956996.

The previous prime is 131956967. The next prime is 131957011. The reversal of 131956997 is 799659131.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 98386561 + 33570436 = 9919^2 + 5794^2 .

It is a cyclic number.

It is not a de Polignac number, because 131956997 - 2²⁴ = 115179781 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (131956967) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65978498 + 65978499.

It is an arithmetic number, because the mean of its divisors is an integer number (65978499).

Almost surely, 2^131956997 is an apocalyptic number.

It is an amenable number.

131956997 is a deficient number, since it is larger than the sum of its proper divisors (1).

131956997 is an equidigital number, since it uses as much as digits as its factorization.

131956997 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 459270, while the sum is 50.

The square root of 131956997 is about 11487.2536752698. The cubic root of 131956997 is about 509.1090390565.

The spelling of 131956997 in words is "one hundred thirty-one million, nine hundred fifty-six thousand, nine hundred ninety-seven".