3949919 has 2 divisors, whose sum is σ = 3949920. Its totient is φ = 3949918.

The previous prime is 3949903. The next prime is 3949961. The reversal of 3949919 is 9199493.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 3949919 - 2⁴ = 3949903 is a prime.

It is a super-2 number, since 2×3949919² = 31203720213122, which contains 22 as substring.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 3949919.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3949969) 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, 1974959 + 1974960.

It is an arithmetic number, because the mean of its divisors is an integer number (1974960).

Almost surely, 2^3949919 is an apocalyptic number.

3949919 is a deficient number, since it is larger than the sum of its proper divisors (1).

3949919 is an equidigital number, since it uses as much as digits as its factorization.

3949919 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 78732, while the sum is 44.

The square root of 3949919 is about 1987.4403135692. The cubic root of 3949919 is about 158.0748323618.

The spelling of 3949919 in words is "three million, nine hundred forty-nine thousand, nine hundred nineteen".