7999906 has 16 divisors (see below), whose sum is σ = 12731328. Its totient is φ = 3762000.

The previous prime is 7999847. The next prime is 7999909. The reversal of 7999906 is 6099997.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 7999906.

It is not an unprimeable number, because it can be changed into a prime (7999909) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1381 + ... + 4231.

It is an arithmetic number, because the mean of its divisors is an integer number (795708).

Almost surely, 2^7999906 is an apocalyptic number.

7999906 is a deficient number, since it is larger than the sum of its proper divisors (4731422).

7999906 is a wasteful number, since it uses less digits than its factorization.

7999906 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2937.

The product of its (nonzero) digits is 275562, while the sum is 49.

The square root of 7999906 is about 2828.4105076880. The cubic root of 7999906 is about 199.9992166636. Note that the first 3 decimals are identical.

The spelling of 7999906 in words is "seven million, nine hundred ninety-nine thousand, nine hundred six".