131837257 has 4 divisors (see below), whose sum is σ = 138776080. Its totient is φ = 124898436.

The previous prime is 131837239. The next prime is 131837267. The reversal of 131837257 is 752738131.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 131837257 - 2¹⁵ = 131804489 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (131837207) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3469383 + ... + 3469420.

It is an arithmetic number, because the mean of its divisors is an integer number (34694020).

Almost surely, 2^131837257 is an apocalyptic number.

It is an amenable number.

131837257 is a deficient number, since it is larger than the sum of its proper divisors (6938823).

131837257 is an equidigital number, since it uses as much as digits as its factorization.

131837257 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6938822.

The product of its digits is 35280, while the sum is 37.

The square root of 131837257 is about 11482.0406287384. The cubic root of 131837257 is about 508.9550010847.

The spelling of 131837257 in words is "one hundred thirty-one million, eight hundred thirty-seven thousand, two hundred fifty-seven".