7893994 has 4 divisors (see below), whose sum is σ = 11840994. Its totient is φ = 3946996.

The previous prime is 7893989. The next prime is 7893997. The reversal of 7893994 is 4993987.

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

It can be written as a sum of positive squares in only one way, i.e., 5349969 + 2544025 = 2313^2 + 1595^2 .

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (7893997) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1973497 + ... + 1973500.

Almost surely, 2^7893994 is an apocalyptic number.

7893994 is a deficient number, since it is larger than the sum of its proper divisors (3947000).

7893994 is a wasteful number, since it uses less digits than its factorization.

7893994 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3946999.

The product of its digits is 489888, while the sum is 49.

The square root of 7893994 is about 2809.6252419139. The cubic root of 7893994 is about 199.1126858564.

The spelling of 7893994 in words is "seven million, eight hundred ninety-three thousand, nine hundred ninety-four".