131899865 has 8 divisors (see below), whose sum is σ = 160187328. Its totient is φ = 104248240.

The previous prime is 131899861. The next prime is 131899879. The reversal of 131899865 is 568998131.

It is a happy number.

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

It is not a de Polignac number, because 131899865 - 2² = 131899861 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (131899861) 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, 158501 + ... + 159330.

It is an arithmetic number, because the mean of its divisors is an integer number (20023416).

Almost surely, 2^131899865 is an apocalyptic number.

It is an amenable number.

131899865 is a deficient number, since it is larger than the sum of its proper divisors (28287463).

131899865 is an equidigital number, since it uses as much as digits as its factorization.

131899865 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 317919.

The product of its digits is 466560, while the sum is 50.

The square root of 131899865 is about 11484.7666497844. The cubic root of 131899865 is about 509.0355539641.

The spelling of 131899865 in words is "one hundred thirty-one million, eight hundred ninety-nine thousand, eight hundred sixty-five".