3993013 has 4 divisors (see below), whose sum is σ = 4016268. Its totient is φ = 3969760.

The previous prime is 3992987. The next prime is 3993019. The reversal of 3993013 is 3103993.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3103993 = 109 ⋅28477.

It can be written as a sum of positive squares in 2 ways, for example, as 2896804 + 1096209 = 1702^2 + 1047^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3993013 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 (3993019) 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, 11368 + ... + 11713.

It is an arithmetic number, because the mean of its divisors is an integer number (1004067).

Almost surely, 2^3993013 is an apocalyptic number.

It is an amenable number.

3993013 is a deficient number, since it is larger than the sum of its proper divisors (23255).

3993013 is a wasteful number, since it uses less digits than its factorization.

3993013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23254.

The product of its (nonzero) digits is 2187, while the sum is 28.

The square root of 3993013 is about 1998.2524865492. The cubic root of 3993013 is about 158.6476249030.

The spelling of 3993013 in words is "three million, nine hundred ninety-three thousand, thirteen".