3939491 has 4 divisors (see below), whose sum is σ = 3951192. Its totient is φ = 3927792.

The previous prime is 3939473. The next prime is 3939497. The reversal of 3939491 is 1949393.

3939491 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1949393 = 53 ⋅36781.

It is a cyclic number.

It is not a de Polignac number, because 3939491 - 2¹⁸ = 3677347 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3939497) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5330 + ... + 6023.

It is an arithmetic number, because the mean of its divisors is an integer number (987798).

Almost surely, 2^3939491 is an apocalyptic number.

3939491 is a deficient number, since it is larger than the sum of its proper divisors (11701).

3939491 is a wasteful number, since it uses less digits than its factorization.

3939491 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11700.

The product of its digits is 26244, while the sum is 38.

The square root of 3939491 is about 1984.8151047390. The cubic root of 3939491 is about 157.9356010586.

The spelling of 3939491 in words is "three million, nine hundred thirty-nine thousand, four hundred ninety-one".