7999975 has 12 divisors (see below), whose sum is σ = 10352016. Its totient is φ = 6121280.

The previous prime is 7999963. The next prime is 7999993. The reversal of 7999975 is 5799997.

It is not a de Polignac number, because 7999975 - 2⁷ = 7999847 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6382 + ... + 7531.

It is an arithmetic number, because the mean of its divisors is an integer number (862668).

Almost surely, 2^7999975 is an apocalyptic number.

7999975 is a deficient number, since it is larger than the sum of its proper divisors (2352041).

7999975 is a wasteful number, since it uses less digits than its factorization.

7999975 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13946 (or 13941 counting only the distinct ones).

The product of its digits is 1607445, while the sum is 55.

The square root of 7999975 is about 2828.4227053254. The cubic root of 7999975 is about 199.9997916664. Note that the first 3 decimals are identical.

The spelling of 7999975 in words is "seven million, nine hundred ninety-nine thousand, nine hundred seventy-five".