131673257 has 2 divisors, whose sum is σ = 131673258. Its totient is φ = 131673256.

The previous prime is 131673203. The next prime is 131673277. The reversal of 131673257 is 752376131.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 126990361 + 4682896 = 11269^2 + 2164^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-131673257 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (131673277) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65836628 + 65836629.

It is an arithmetic number, because the mean of its divisors is an integer number (65836629).

Almost surely, 2^131673257 is an apocalyptic number.

It is an amenable number.

131673257 is a deficient number, since it is larger than the sum of its proper divisors (1).

131673257 is an equidigital number, since it uses as much as digits as its factorization.

131673257 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 26460, while the sum is 35.

The square root of 131673257 is about 11474.8968187082. The cubic root of 131673257 is about 508.7438739812.

The spelling of 131673257 in words is "one hundred thirty-one million, six hundred seventy-three thousand, two hundred fifty-seven".