131321679 has 4 divisors (see below), whose sum is σ = 175095576. Its totient is φ = 87547784.

The previous prime is 131321677. The next prime is 131321681. The reversal of 131321679 is 976123131.

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

It is an interprime number because it is at equal distance from previous prime (131321677) and next prime (131321681).

It is a cyclic number.

It is not a de Polignac number, because 131321679 - 2¹ = 131321677 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131321677) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21886944 + ... + 21886949.

It is an arithmetic number, because the mean of its divisors is an integer number (43773894).

Almost surely, 2^131321679 is an apocalyptic number.

131321679 is a deficient number, since it is larger than the sum of its proper divisors (43773897).

131321679 is an equidigital number, since it uses as much as digits as its factorization.

131321679 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43773896.

The product of its digits is 6804, while the sum is 33.

The square root of 131321679 is about 11459.5671384219. The cubic root of 131321679 is about 508.2906749356.

The spelling of 131321679 in words is "one hundred thirty-one million, three hundred twenty-one thousand, six hundred seventy-nine".