131870785 has 16 divisors (see below), whose sum is σ = 169921152. Its totient is φ = 97888000.

The previous prime is 131870779. The next prime is 131870813. The reversal of 131870785 is 587078131.

It is a happy number.

It is not a de Polignac number, because 131870785 - 2¹⁹ = 131346497 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4891 + ... + 16960.

It is an arithmetic number, because the mean of its divisors is an integer number (10620072).

Almost surely, 2^131870785 is an apocalyptic number.

It is an amenable number.

131870785 is a deficient number, since it is larger than the sum of its proper divisors (38050367).

131870785 is a wasteful number, since it uses less digits than its factorization.

131870785 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21944.

The product of its (nonzero) digits is 47040, while the sum is 40.

The square root of 131870785 is about 11483.5005551443. The cubic root of 131870785 is about 508.9981421444.

The spelling of 131870785 in words is "one hundred thirty-one million, eight hundred seventy thousand, seven hundred eighty-five".