3139909 has 2 divisors, whose sum is σ = 3139910. Its totient is φ = 3139908.

The previous prime is 3139907. The next prime is 3139919. The reversal of 3139909 is 9099313.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2879809 + 260100 = 1697^2 + 510^2 .

It is a cyclic number.

It is not a de Polignac number, because 3139909 - 2¹ = 3139907 is a prime.

Together with 3139907, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3139901) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1569954 + 1569955.

It is an arithmetic number, because the mean of its divisors is an integer number (1569955).

Almost surely, 2^3139909 is an apocalyptic number.

It is an amenable number.

3139909 is a deficient number, since it is larger than the sum of its proper divisors (1).

3139909 is an equidigital number, since it uses as much as digits as its factorization.

3139909 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6561, while the sum is 34.

The square root of 3139909 is about 1771.9788373454. The cubic root of 3139909 is about 146.4330204365.

The spelling of 3139909 in words is "three million, one hundred thirty-nine thousand, nine hundred nine".