3949893 has 6 divisors (see below), whose sum is σ = 5705414. Its totient is φ = 2633256.

The previous prime is 3949889. The next prime is 3949903. The reversal of 3949893 is 3989493.

It can be written as a sum of positive squares in only one way, i.e., 3090564 + 859329 = 1758^2 + 927^2 .

It is not a de Polignac number, because 3949893 - 2² = 3949889 is a prime.

It is a super-2 number, since 2×3949893² = 31203309422898, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3949193) 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, 219430 + ... + 219447.

Almost surely, 2^3949893 is an apocalyptic number.

It is an amenable number.

3949893 is a deficient number, since it is larger than the sum of its proper divisors (1755521).

3949893 is a wasteful number, since it uses less digits than its factorization.

3949893 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 438883 (or 438880 counting only the distinct ones).

The product of its digits is 209952, while the sum is 45.

The square root of 3949893 is about 1987.4337724815. The cubic root of 3949893 is about 158.0744855230.

The spelling of 3949893 in words is "three million, nine hundred forty-nine thousand, eight hundred ninety-three".