3991413 has 16 divisors (see below), whose sum is σ = 5731776. Its totient is φ = 2461440.

The previous prime is 3991399. The next prime is 3991441. The reversal of 3991413 is 3141993.

It is not a de Polignac number, because 3991413 - 2⁹ = 3990901 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3991313) 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, 2470 + ... + 3752.

It is an arithmetic number, because the mean of its divisors is an integer number (358236).

Almost surely, 2^3991413 is an apocalyptic number.

It is an amenable number.

3991413 is a deficient number, since it is larger than the sum of its proper divisors (1740363).

3991413 is a wasteful number, since it uses less digits than its factorization.

3991413 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1364.

The product of its digits is 2916, while the sum is 30.

The square root of 3991413 is about 1997.8520966278. The cubic root of 3991413 is about 158.6264320417.

The spelling of 3991413 in words is "three million, nine hundred ninety-one thousand, four hundred thirteen".