131878657 has 8 divisors (see below), whose sum is σ = 132705216. Its totient is φ = 131055312.

The previous prime is 131878651. The next prime is 131878697. The reversal of 131878657 is 756878131.

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 131878657 - 2²³ = 123490049 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (131878651) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 203508 + ... + 204154.

It is an arithmetic number, because the mean of its divisors is an integer number (16588152).

Almost surely, 2^131878657 is an apocalyptic number.

It is an amenable number.

131878657 is a deficient number, since it is larger than the sum of its proper divisors (826559).

131878657 is an equidigital number, since it uses as much as digits as its factorization.

131878657 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1607.

The product of its digits is 282240, while the sum is 46.

The square root of 131878657 is about 11483.8433026579. The cubic root of 131878657 is about 509.0082701234.

The spelling of 131878657 in words is "one hundred thirty-one million, eight hundred seventy-eight thousand, six hundred fifty-seven".