131246879 has 4 divisors (see below), whose sum is σ = 134299176. Its totient is φ = 128194584.

The previous prime is 131246861. The next prime is 131246909. The reversal of 131246879 is 978642131.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-131246879 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131206879) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1526084 + ... + 1526169.

It is an arithmetic number, because the mean of its divisors is an integer number (33574794).

Almost surely, 2^131246879 is an apocalyptic number.

131246879 is a deficient number, since it is larger than the sum of its proper divisors (3052297).

131246879 is an equidigital number, since it uses as much as digits as its factorization.

131246879 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3052296.

The product of its digits is 72576, while the sum is 41.

The square root of 131246879 is about 11456.3030249728. The cubic root of 131246879 is about 508.1941502193.

The spelling of 131246879 in words is "one hundred thirty-one million, two hundred forty-six thousand, eight hundred seventy-nine".