131920617 has 8 divisors (see below), whose sum is σ = 183541824. Its totient is φ = 84123248.

The previous prime is 131920601. The next prime is 131920669. The reversal of 131920617 is 716029131.

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 131920617 - 2⁴ = 131920601 is a prime.

It is not an unprimeable number, because it can be changed into a prime (131920687) 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, 955878 + ... + 956015.

It is an arithmetic number, because the mean of its divisors is an integer number (22942728).

Almost surely, 2^131920617 is an apocalyptic number.

It is an amenable number.

131920617 is a deficient number, since it is larger than the sum of its proper divisors (51621207).

131920617 is a wasteful number, since it uses less digits than its factorization.

131920617 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1911919.

The product of its (nonzero) digits is 2268, while the sum is 30.

The square root of 131920617 is about 11485.6700718765. The cubic root of 131920617 is about 509.0622483353.

Adding to 131920617 its reverse (716029131), we get a palindrome (847949748).

The spelling of 131920617 in words is "one hundred thirty-one million, nine hundred twenty thousand, six hundred seventeen".