131495899 has 4 divisors (see below), whose sum is σ = 137213136. Its totient is φ = 125778664.

The previous prime is 131495887. The next prime is 131495909. The reversal of 131495899 is 998594131.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 131495899 - 2⁹ = 131495387 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (131495869) 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, 2858584 + ... + 2858629.

It is an arithmetic number, because the mean of its divisors is an integer number (34303284).

Almost surely, 2^131495899 is an apocalyptic number.

131495899 is a deficient number, since it is larger than the sum of its proper divisors (5717237).

131495899 is an equidigital number, since it uses as much as digits as its factorization.

131495899 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5717236.

The product of its digits is 349920, while the sum is 49.

The square root of 131495899 is about 11467.1661276882. The cubic root of 131495899 is about 508.5153529177.

The spelling of 131495899 in words is "one hundred thirty-one million, four hundred ninety-five thousand, eight hundred ninety-nine".