7913813 has 8 divisors (see below), whose sum is σ = 8139648. Its totient is φ = 7690464.

The previous prime is 7913809. The next prime is 7913831. The reversal of 7913813 is 3183197.

7913813 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 7913813 - 2² = 7913809 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 7913813.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7913833) 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 7 ways as a sum of consecutive naturals, for example, 7145 + ... + 8177.

It is an arithmetic number, because the mean of its divisors is an integer number (1017456).

Almost surely, 2^7913813 is an apocalyptic number.

It is an amenable number.

7913813 is a deficient number, since it is larger than the sum of its proper divisors (225835).

7913813 is a wasteful number, since it uses less digits than its factorization.

7913813 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1243.

The product of its digits is 4536, while the sum is 32.

The square root of 7913813 is about 2813.1500137746. The cubic root of 7913813 is about 199.2791802152.

The spelling of 7913813 in words is "seven million, nine hundred thirteen thousand, eight hundred thirteen".