3949239 has 16 divisors (see below), whose sum is σ = 6056960. Its totient is φ = 2242080.

The previous prime is 3949217. The next prime is 3949241. The reversal of 3949239 is 9329493.

It is not a de Polignac number, because 3949239 - 2⁷ = 3949111 is a prime.

3949239 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 3949197 and 3949206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3949039) 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, 3282 + ... + 4320.

It is an arithmetic number, because the mean of its divisors is an integer number (378560).

Almost surely, 2^3949239 is an apocalyptic number.

3949239 is a deficient number, since it is larger than the sum of its proper divisors (2107721).

3949239 is a wasteful number, since it uses less digits than its factorization.

3949239 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1230.

The product of its digits is 52488, while the sum is 39.

The square root of 3949239 is about 1987.2692318858. The cubic root of 3949239 is about 158.0657606943.

The spelling of 3949239 in words is "three million, nine hundred forty-nine thousand, two hundred thirty-nine".