7998994 has 4 divisors (see below), whose sum is σ = 11998494. Its totient is φ = 3999496.

The previous prime is 7998979. The next prime is 7999051. The reversal of 7998994 is 4998997.

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., 6275025 + 1723969 = 2505^2 + 1313^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1999747 + ... + 1999750.

Almost surely, 2^7998994 is an apocalyptic number.

7998994 is a deficient number, since it is larger than the sum of its proper divisors (3999500).

7998994 is a wasteful number, since it uses less digits than its factorization.

7998994 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3999499.

The product of its digits is 1469664, while the sum is 55.

The square root of 7998994 is about 2828.2492817996. The cubic root of 7998994 is about 199.9916163152.

The spelling of 7998994 in words is "seven million, nine hundred ninety-eight thousand, nine hundred ninety-four".