7985999 has 8 divisors (see below), whose sum is σ = 9151488. Its totient is φ = 6826680.

The previous prime is 7985983. The next prime is 7986001. The reversal of 7985999 is 9995897.

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

It is not a de Polignac number, because 7985999 - 2⁴ = 7985983 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7985959) 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, 1694 + ... + 4340.

It is an arithmetic number, because the mean of its divisors is an integer number (1143936).

Almost surely, 2^7985999 is an apocalyptic number.

7985999 is a deficient number, since it is larger than the sum of its proper divisors (1165489).

7985999 is a wasteful number, since it uses less digits than its factorization.

7985999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3085.

The product of its digits is 1837080, while the sum is 56.

The square root of 7985999 is about 2825.9509903747. The cubic root of 7985999 is about 199.8832568685.

The spelling of 7985999 in words is "seven million, nine hundred eighty-five thousand, nine hundred ninety-nine".