131657437 has 8 divisors (see below), whose sum is σ = 135245880. Its totient is φ = 128087040.

The previous prime is 131657413. The next prime is 131657447. The reversal of 131657437 is 734756131.

It can be written as a sum of positive squares in 4 ways, for example, as 4761 + 131652676 = 69^2 + 11474^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 131657437 - 2²³ = 123268829 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 131657396 and 131657405.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131657447) 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 in 7 ways as a sum of consecutive naturals, for example, 10989 + ... + 19597.

It is an arithmetic number, because the mean of its divisors is an integer number (16905735).

Almost surely, 2^131657437 is an apocalyptic number.

It is an amenable number.

131657437 is a deficient number, since it is larger than the sum of its proper divisors (3588443).

131657437 is an equidigital number, since it uses as much as digits as its factorization.

131657437 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9023.

The product of its digits is 52920, while the sum is 37.

The square root of 131657437 is about 11474.2074671848. The cubic root of 131657437 is about 508.7234986709.

It can be divided in two parts, 13165 and 7437, that added together give a palindrome (20602).

The spelling of 131657437 in words is "one hundred thirty-one million, six hundred fifty-seven thousand, four hundred thirty-seven".