131868913 has 16 divisors (see below), whose sum is σ = 150823296. Its totient is φ = 114125440.

The previous prime is 131868901. The next prime is 131868973. The reversal of 131868913 is 319868131.

It is a de Polignac number, because none of the positive numbers 2^k-131868913 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (131868973) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 57831 + ... + 60067.

It is an arithmetic number, because the mean of its divisors is an integer number (9426456).

Almost surely, 2^131868913 is an apocalyptic number.

It is an amenable number.

131868913 is a deficient number, since it is larger than the sum of its proper divisors (18954383).

131868913 is a wasteful number, since it uses less digits than its factorization.

131868913 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2504.

The product of its digits is 31104, while the sum is 40.

The square root of 131868913 is about 11483.4190466080. The cubic root of 131868913 is about 508.9957336022.

The spelling of 131868913 in words is "one hundred thirty-one million, eight hundred sixty-eight thousand, nine hundred thirteen".