131279823 has 24 divisors (see below), whose sum is σ = 196385280. Its totient is φ = 84419280.

The previous prime is 131279809. The next prime is 131279849. The reversal of 131279823 is 328972131.

It is not a de Polignac number, because 131279823 - 2⁴ = 131279807 is a prime.

It is a super-2 number, since 2×131279823² = 34468783853822658, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131279803) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 116340 + ... + 117462.

It is an arithmetic number, because the mean of its divisors is an integer number (8182720).

Almost surely, 2^131279823 is an apocalyptic number.

131279823 is a deficient number, since it is larger than the sum of its proper divisors (65105457).

131279823 is a wasteful number, since it uses less digits than its factorization.

131279823 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1579 (or 1576 counting only the distinct ones).

The product of its digits is 18144, while the sum is 36.

The square root of 131279823 is about 11457.7407458888. The cubic root of 131279823 is about 508.2366669064.

The spelling of 131279823 in words is "one hundred thirty-one million, two hundred seventy-nine thousand, eight hundred twenty-three".