3131399 has 4 divisors (see below), whose sum is σ = 3190536. Its totient is φ = 3072264.

The previous prime is 3131377. The next prime is 3131419. The reversal of 3131399 is 9931313.

3131399 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9931313 = 7 ⋅1418759.

It is a cyclic number.

It is not a de Polignac number, because 3131399 - 2¹⁶ = 3065863 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 (3131309) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 29489 + ... + 29594.

It is an arithmetic number, because the mean of its divisors is an integer number (797634).

Almost surely, 2^3131399 is an apocalyptic number.

3131399 is a deficient number, since it is larger than the sum of its proper divisors (59137).

3131399 is an equidigital number, since it uses as much as digits as its factorization.

3131399 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 59136.

The product of its digits is 2187, while the sum is 29.

The square root of 3131399 is about 1769.5759379015. The cubic root of 3131399 is about 146.3006097521.

The spelling of 3131399 in words is "three million, one hundred thirty-one thousand, three hundred ninety-nine".