3129939 has 6 divisors (see below), whose sum is σ = 4521036. Its totient is φ = 2086620.

The previous prime is 3129937. The next prime is 3129943. The reversal of 3129939 is 9399213.

It is not a de Polignac number, because 3129939 - 2¹ = 3129937 is a prime.

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (3129937) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 173877 + ... + 173894.

It is an arithmetic number, because the mean of its divisors is an integer number (753506).

Almost surely, 2^3129939 is an apocalyptic number.

3129939 is a deficient number, since it is larger than the sum of its proper divisors (1391097).

3129939 is a wasteful number, since it uses less digits than its factorization.

3129939 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 347777 (or 347774 counting only the distinct ones).

The product of its digits is 13122, while the sum is 36.

The square root of 3129939 is about 1769.1633615921. The cubic root of 3129939 is about 146.2778688946.

The spelling of 3129939 in words is "three million, one hundred twenty-nine thousand, nine hundred thirty-nine".