131396279 has 4 divisors (see below), whose sum is σ = 150167184. Its totient is φ = 112625376.

The previous prime is 131396249. The next prime is 131396299. The reversal of 131396279 is 972693131.

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

It is a cyclic number.

It is not a de Polignac number, because 131396279 - 2²⁰ = 130347703 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 (131396249) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9385442 + ... + 9385455.

It is an arithmetic number, because the mean of its divisors is an integer number (37541796).

Almost surely, 2^131396279 is an apocalyptic number.

131396279 is a deficient number, since it is larger than the sum of its proper divisors (18770905).

131396279 is an equidigital number, since it uses as much as digits as its factorization.

131396279 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18770904.

The product of its digits is 61236, while the sum is 41.

The square root of 131396279 is about 11462.8215985420. The cubic root of 131396279 is about 508.3869050650.

The spelling of 131396279 in words is "one hundred thirty-one million, three hundred ninety-six thousand, two hundred seventy-nine".