131896865 has 4 divisors (see below), whose sum is σ = 158276244. Its totient is φ = 105517488.

The previous prime is 131896859. The next prime is 131896871. The reversal of 131896865 is 568698131.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 568698131 = 31 ⋅18345101.

It is an interprime number because it is at equal distance from previous prime (131896859) and next prime (131896871).

It can be written as a sum of positive squares in 2 ways, for example, as 101767744 + 30129121 = 10088^2 + 5489^2 .

It is a cyclic number.

It is not a de Polignac number, because 131896865 - 2²⁴ = 115119649 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13189682 + ... + 13189691.

It is an arithmetic number, because the mean of its divisors is an integer number (39569061).

Almost surely, 2^131896865 is an apocalyptic number.

It is an amenable number.

131896865 is a deficient number, since it is larger than the sum of its proper divisors (26379379).

131896865 is an equidigital number, since it uses as much as digits as its factorization.

131896865 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26379378.

The product of its digits is 311040, while the sum is 47.

The square root of 131896865 is about 11484.6360412509. The cubic root of 131896865 is about 509.0316946772.

The spelling of 131896865 in words is "one hundred thirty-one million, eight hundred ninety-six thousand, eight hundred sixty-five".