131640797 has 8 divisors (see below), whose sum is σ = 139113600. Its totient is φ = 124222464.

The previous prime is 131640793. The next prime is 131640811. The reversal of 131640797 is 797046131.

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 131640797 - 2² = 131640793 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 131640797.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131640793) 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, 8597 + ... + 18362.

It is an arithmetic number, because the mean of its divisors is an integer number (17389200).

Almost surely, 2^131640797 is an apocalyptic number.

It is an amenable number.

131640797 is a deficient number, since it is larger than the sum of its proper divisors (7472803).

131640797 is a wasteful number, since it uses less digits than its factorization.

131640797 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27235.

The product of its (nonzero) digits is 31752, while the sum is 38.

The square root of 131640797 is about 11473.4823397258. The cubic root of 131640797 is about 508.7020654832.

The spelling of 131640797 in words is "one hundred thirty-one million, six hundred forty thousand, seven hundred ninety-seven".