7906813 has 4 divisors (see below), whose sum is σ = 7959328. Its totient is φ = 7854300.

The previous prime is 7906807. The next prime is 7906817. The reversal of 7906813 is 3186097.

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: 3186097 = 1423 ⋅2239.

It is a cyclic number.

It is not a de Polignac number, because 7906813 - 2⁵ = 7906781 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 (7906817) 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, 26031 + ... + 26332.

It is an arithmetic number, because the mean of its divisors is an integer number (1989832).

Almost surely, 2^7906813 is an apocalyptic number.

It is an amenable number.

7906813 is a deficient number, since it is larger than the sum of its proper divisors (52515).

7906813 is a wasteful number, since it uses less digits than its factorization.

7906813 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52514.

The product of its (nonzero) digits is 9072, while the sum is 34.

The square root of 7906813 is about 2811.9055816297. The cubic root of 7906813 is about 199.2204067872.

The spelling of 7906813 in words is "seven million, nine hundred six thousand, eight hundred thirteen".