3994013 has 4 divisors (see below), whose sum is σ = 4079040. Its totient is φ = 3908988.

The previous prime is 3994007. The next prime is 3994021. The reversal of 3994013 is 3104993.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 3104993 = 59 ⋅52627.

It is a cyclic number.

It is not a de Polignac number, because 3994013 - 2⁶ = 3993949 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3994213) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 42443 + ... + 42536.

It is an arithmetic number, because the mean of its divisors is an integer number (1019760).

Almost surely, 2^3994013 is an apocalyptic number.

It is an amenable number.

3994013 is a deficient number, since it is larger than the sum of its proper divisors (85027).

3994013 is an equidigital number, since it uses as much as digits as its factorization.

3994013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85026.

The product of its (nonzero) digits is 2916, while the sum is 29.

The square root of 3994013 is about 1998.5026895153. The cubic root of 3994013 is about 158.6608675665.

The spelling of 3994013 in words is "three million, nine hundred ninety-four thousand, thirteen".