131640499 has 8 divisors (see below), whose sum is σ = 135360720. Its totient is φ = 127966176.

The previous prime is 131640497. The next prime is 131640511. The reversal of 131640499 is 994046131.

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

It is a cyclic number.

It is not a de Polignac number, because 131640499 - 2¹ = 131640497 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (131640491) 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, 5617 + ... + 17170.

It is an arithmetic number, because the mean of its divisors is an integer number (16920090).

Almost surely, 2^131640499 is an apocalyptic number.

131640499 is a deficient number, since it is larger than the sum of its proper divisors (3720221).

131640499 is a wasteful number, since it uses less digits than its factorization.

131640499 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22949.

The product of its (nonzero) digits is 23328, while the sum is 37.

The square root of 131640499 is about 11473.4693532514. The cubic root of 131640499 is about 508.7016816272.

The spelling of 131640499 in words is "one hundred thirty-one million, six hundred forty thousand, four hundred ninety-nine".