131801279 has 4 divisors (see below), whose sum is σ = 132967776. Its totient is φ = 130634784.

The previous prime is 131801273. The next prime is 131801353. The reversal of 131801279 is 972108131.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 972108131 = 59 ⋅16476409.

It is a cyclic number.

It is not a de Polignac number, because 131801279 - 2⁸ = 131801023 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 (131801273) 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, 583079 + ... + 583304.

It is an arithmetic number, because the mean of its divisors is an integer number (33241944).

Almost surely, 2^131801279 is an apocalyptic number.

131801279 is a deficient number, since it is larger than the sum of its proper divisors (1166497).

131801279 is a wasteful number, since it uses less digits than its factorization.

131801279 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1166496.

The product of its (nonzero) digits is 3024, while the sum is 32.

The square root of 131801279 is about 11480.4738142639. The cubic root of 131801279 is about 508.9086994312.

The spelling of 131801279 in words is "one hundred thirty-one million, eight hundred one thousand, two hundred seventy-nine".