3949539 has 16 divisors (see below), whose sum is σ = 5944320. Its totient is φ = 2310560.

The previous prime is 3949531. The next prime is 3949541. The reversal of 3949539 is 9359493.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 3949539 - 2³ = 3949531 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 3949539.

It is not an unprimeable number, because it can be changed into a prime (3949531) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1107 + ... + 3020.

It is an arithmetic number, because the mean of its divisors is an integer number (371520).

Almost surely, 2^3949539 is an apocalyptic number.

3949539 is a deficient number, since it is larger than the sum of its proper divisors (1994781).

3949539 is a wasteful number, since it uses less digits than its factorization.

3949539 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4170.

The product of its digits is 131220, while the sum is 42.

The square root of 3949539 is about 1987.3447109145. The cubic root of 3949539 is about 158.0697630289.

The spelling of 3949539 in words is "three million, nine hundred forty-nine thousand, five hundred thirty-nine".