131783657 has 2 divisors, whose sum is σ = 131783658. Its totient is φ = 131783656.

The previous prime is 131783633. The next prime is 131783669. The reversal of 131783657 is 756387131.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 97397161 + 34386496 = 9869^2 + 5864^2 .

It is a cyclic number.

It is not a de Polignac number, because 131783657 - 2⁸ = 131783401 is a prime.

It is not a weakly prime, because it can be changed into another prime (131780657) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65891828 + 65891829.

It is an arithmetic number, because the mean of its divisors is an integer number (65891829).

Almost surely, 2^131783657 is an apocalyptic number.

It is an amenable number.

131783657 is a deficient number, since it is larger than the sum of its proper divisors (1).

131783657 is an equidigital number, since it uses as much as digits as its factorization.

131783657 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 105840, while the sum is 41.

The square root of 131783657 is about 11479.7063115744. The cubic root of 131783657 is about 508.8860178384.

The spelling of 131783657 in words is "one hundred thirty-one million, seven hundred eighty-three thousand, six hundred fifty-seven".