3949947 has 12 divisors (see below), whose sum is σ = 5762224. Its totient is φ = 2607120.

The previous prime is 3949919. The next prime is 3949961. The reversal of 3949947 is 7499493.

It is not a de Polignac number, because 3949947 - 2⁷ = 3949819 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3949147) 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 in 11 ways as a sum of consecutive naturals, for example, 1204 + ... + 3057.

Almost surely, 2^3949947 is an apocalyptic number.

3949947 is a deficient number, since it is larger than the sum of its proper divisors (1812277).

3949947 is a wasteful number, since it uses less digits than its factorization.

3949947 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4370 (or 4367 counting only the distinct ones).

The product of its digits is 244944, while the sum is 45.

The square root of 3949947 is about 1987.4473577934. The cubic root of 3949947 is about 158.0752058787.

The spelling of 3949947 in words is "three million, nine hundred forty-nine thousand, nine hundred forty-seven".