131061657 has 4 divisors (see below), whose sum is σ = 174748880. Its totient is φ = 87374436.

The previous prime is 131061649. The next prime is 131061661. The reversal of 131061657 is 756160131.

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 not a de Polignac number, because 131061657 - 2³ = 131061649 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (131061607) 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 3 ways as a sum of consecutive naturals, for example, 21843607 + ... + 21843612.

It is an arithmetic number, because the mean of its divisors is an integer number (43687220).

Almost surely, 2^131061657 is an apocalyptic number.

It is an amenable number.

131061657 is a deficient number, since it is larger than the sum of its proper divisors (43687223).

131061657 is an equidigital number, since it uses as much as digits as its factorization.

131061657 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43687222.

The product of its (nonzero) digits is 3780, while the sum is 30.

The square root of 131061657 is about 11448.2163239520. The cubic root of 131061657 is about 507.9549748777.

The spelling of 131061657 in words is "one hundred thirty-one million, sixty-one thousand, six hundred fifty-seven".