131251879 has 4 divisors (see below), whose sum is σ = 143183880. Its totient is φ = 119319880.

The previous prime is 131251847. The next prime is 131251909. The reversal of 131251879 is 978152131.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 978152131 = 11 ⋅88922921.

It is a cyclic number.

It is not a de Polignac number, because 131251879 - 2⁵ = 131251847 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 (131251819) 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, 5965984 + ... + 5966005.

It is an arithmetic number, because the mean of its divisors is an integer number (35795970).

Almost surely, 2^131251879 is an apocalyptic number.

131251879 is a deficient number, since it is larger than the sum of its proper divisors (11932001).

131251879 is a wasteful number, since it uses less digits than its factorization.

131251879 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11932000.

The product of its digits is 15120, while the sum is 37.

The square root of 131251879 is about 11456.5212433792. The cubic root of 131251879 is about 508.2006035498.

The spelling of 131251879 in words is "one hundred thirty-one million, two hundred fifty-one thousand, eight hundred seventy-nine".