113131399 has 2 divisors, whose sum is σ = 113131400. Its totient is φ = 113131398.

The previous prime is 113131373. The next prime is 113131429. The reversal of 113131399 is 993131311.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 113131399 - 2⁹ = 113130887 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 113131399.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (113131099) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 56565699 + 56565700.

It is an arithmetic number, because the mean of its divisors is an integer number (56565700).

Almost surely, 2^113131399 is an apocalyptic number.

113131399 is a deficient number, since it is larger than the sum of its proper divisors (1).

113131399 is an equidigital number, since it uses as much as digits as its factorization.

113131399 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2187, while the sum is 31.

The square root of 113131399 is about 10636.3245061440. The cubic root of 113131399 is about 483.6461324671.

The spelling of 113131399 in words is "one hundred thirteen million, one hundred thirty-one thousand, three hundred ninety-nine".