131122399 has 4 divisors (see below), whose sum is σ = 132395536. Its totient is φ = 129849264.

The previous prime is 131122393. The next prime is 131122421. The reversal of 131122399 is 993221131.

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 131122399 - 2³ = 131122391 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 131122399.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131122391) 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, 636414 + ... + 636619.

It is an arithmetic number, because the mean of its divisors is an integer number (33098884).

Almost surely, 2^131122399 is an apocalyptic number.

131122399 is a deficient number, since it is larger than the sum of its proper divisors (1273137).

131122399 is a wasteful number, since it uses less digits than its factorization.

131122399 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1273136.

The product of its digits is 2916, while the sum is 31.

The square root of 131122399 is about 11450.8689189948. The cubic root of 131122399 is about 508.0334352412.

The spelling of 131122399 in words is "one hundred thirty-one million, one hundred twenty-two thousand, three hundred ninety-nine".