3131409 has 16 divisors (see below), whose sum is σ = 4438080. Its totient is φ = 1958400.

The previous prime is 3131377. The next prime is 3131419. The reversal of 3131409 is 9041313.

It is not a de Polignac number, because 3131409 - 2⁵ = 3131377 is a prime.

It is not an unprimeable number, because it can be changed into a prime (3131419) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7609 + ... + 8009.

It is an arithmetic number, because the mean of its divisors is an integer number (277380).

Almost surely, 2^3131409 is an apocalyptic number.

It is an amenable number.

3131409 is a deficient number, since it is larger than the sum of its proper divisors (1306671).

3131409 is a wasteful number, since it uses less digits than its factorization.

3131409 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 560.

The product of its (nonzero) digits is 324, while the sum is 21.

The square root of 3131409 is about 1769.5787634350. The cubic root of 3131409 is about 146.3007654871.

The spelling of 3131409 in words is "three million, one hundred thirty-one thousand, four hundred nine".