7894813 has 4 divisors (see below), whose sum is σ = 7909948. Its totient is φ = 7879680.

The previous prime is 7894807. The next prime is 7894829. The reversal of 7894813 is 3184987.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1734489 + 6160324 = 1317^2 + 2482^2 .

It is a cyclic number.

It is not a de Polignac number, because 7894813 - 2⁹ = 7894301 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 (7894883) 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, 6756 + ... + 7837.

It is an arithmetic number, because the mean of its divisors is an integer number (1977487).

Almost surely, 2^7894813 is an apocalyptic number.

It is an amenable number.

7894813 is a deficient number, since it is larger than the sum of its proper divisors (15135).

7894813 is a wasteful number, since it uses less digits than its factorization.

7894813 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15134.

The product of its digits is 48384, while the sum is 40.

The square root of 7894813 is about 2809.7709871091. The cubic root of 7894813 is about 199.1195715829.

It can be divided in two parts, 78948 and 13, that added together give a square (78961 = 281²).

The spelling of 7894813 in words is "seven million, eight hundred ninety-four thousand, eight hundred thirteen".