3131909 has 8 divisors (see below), whose sum is σ = 3451680. Its totient is φ = 2818000.

The previous prime is 3131879. The next prime is 3131911. The reversal of 3131909 is 9091313.

3131909 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3131909 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 (3131209) 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 7 ways as a sum of consecutive naturals, for example, 299 + ... + 2520.

It is an arithmetic number, because the mean of its divisors is an integer number (431460).

Almost surely, 2^3131909 is an apocalyptic number.

It is an amenable number.

3131909 is a deficient number, since it is larger than the sum of its proper divisors (319771).

3131909 is a wasteful number, since it uses less digits than its factorization.

3131909 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2931.

The product of its (nonzero) digits is 729, while the sum is 26.

The square root of 3131909 is about 1769.7200343557. The cubic root of 3131909 is about 146.3085518105.

It can be divided in two parts, 313 and 1909, that added together give a palindrome (2222).

The spelling of 3131909 in words is "three million, one hundred thirty-one thousand, nine hundred nine".