131465899 has 4 divisors (see below), whose sum is σ = 131809536. Its totient is φ = 131122264.

The previous prime is 131465849. The next prime is 131465927. The reversal of 131465899 is 998564131.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 998564131 = 173 ⋅5772047.

It is a cyclic number.

It is not a de Polignac number, because 131465899 - 2⁷ = 131465771 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (131465809) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 171244 + ... + 172009.

It is an arithmetic number, because the mean of its divisors is an integer number (32952384).

Almost surely, 2^131465899 is an apocalyptic number.

131465899 is a deficient number, since it is larger than the sum of its proper divisors (343637).

131465899 is an equidigital number, since it uses as much as digits as its factorization.

131465899 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 343636.

The product of its digits is 233280, while the sum is 46.

The square root of 131465899 is about 11465.8579705140. The cubic root of 131465899 is about 508.4766784014.

The spelling of 131465899 in words is "one hundred thirty-one million, four hundred sixty-five thousand, eight hundred ninety-nine".