3949609 has 2 divisors, whose sum is σ = 3949610. Its totient is φ = 3949608.

The previous prime is 3949579. The next prime is 3949619. The reversal of 3949609 is 9069493.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2576025 + 1373584 = 1605^2 + 1172^2 .

It is a cyclic number.

It is not a de Polignac number, because 3949609 - 2⁹ = 3949097 is a prime.

It is a super-2 number, since 2×3949609² = 31198822505762, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3949619) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1974804 + 1974805.

It is an arithmetic number, because the mean of its divisors is an integer number (1974805).

Almost surely, 2^3949609 is an apocalyptic number.

It is an amenable number.

3949609 is a deficient number, since it is larger than the sum of its proper divisors (1).

3949609 is an equidigital number, since it uses as much as digits as its factorization.

3949609 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 52488, while the sum is 40.

The square root of 3949609 is about 1987.3623222754. The cubic root of 3949609 is about 158.0706968778.

The spelling of 3949609 in words is "three million, nine hundred forty-nine thousand, six hundred nine".