131599899 has 6 divisors (see below), whose sum is σ = 190088756. Its totient is φ = 87733260.

The previous prime is 131599847. The next prime is 131599921. The reversal of 131599899 is 998995131.

It is not a de Polignac number, because 131599899 - 2¹⁹ = 131075611 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (131599799) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 7311097 + ... + 7311114.

Almost surely, 2^131599899 is an apocalyptic number.

131599899 is a deficient number, since it is larger than the sum of its proper divisors (58488857).

131599899 is a wasteful number, since it uses less digits than its factorization.

131599899 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14622217 (or 14622214 counting only the distinct ones).

The product of its digits is 787320, while the sum is 54.

The square root of 131599899 is about 11471.6999176234. The cubic root of 131599899 is about 508.6493790504.

The spelling of 131599899 in words is "one hundred thirty-one million, five hundred ninety-nine thousand, eight hundred ninety-nine".