7899983 has 8 divisors (see below), whose sum is σ = 9723168. Its totient is φ = 6250464.

The previous prime is 7899979. The next prime is 7899989. The reversal of 7899983 is 3899987.

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

It is a cyclic number.

It is not a de Polignac number, because 7899983 - 2² = 7899979 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7899989) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 43316 + ... + 43497.

It is an arithmetic number, because the mean of its divisors is an integer number (1215396).

Almost surely, 2^7899983 is an apocalyptic number.

7899983 is a deficient number, since it is larger than the sum of its proper divisors (1823185).

7899983 is a wasteful number, since it uses less digits than its factorization.

7899983 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 86833.

The product of its digits is 979776, while the sum is 53.

The square root of 7899983 is about 2810.6908403451. The cubic root of 7899983 is about 199.1630272692.

The spelling of 7899983 in words is "seven million, eight hundred ninety-nine thousand, nine hundred eighty-three".