7971994 has 8 divisors (see below), whose sum is σ = 12074400. Its totient is φ = 3947196.

The previous prime is 7971973. The next prime is 7972009. The reversal of 7971994 is 4991797.

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19144 + ... + 19555.

It is an arithmetic number, because the mean of its divisors is an integer number (1509300).

Almost surely, 2^7971994 is an apocalyptic number.

7971994 is a deficient number, since it is larger than the sum of its proper divisors (4102406).

7971994 is a wasteful number, since it uses less digits than its factorization.

7971994 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38804.

The product of its digits is 142884, while the sum is 46.

The square root of 7971994 is about 2823.4719761315. The cubic root of 7971994 is about 199.7663437969.

The spelling of 7971994 in words is "seven million, nine hundred seventy-one thousand, nine hundred ninety-four".