7990659 has 24 divisors (see below), whose sum is σ = 12317760. Its totient is φ = 4977072.

The previous prime is 7990649. The next prime is 7990667. The reversal of 7990659 is 9560997.

It is not a de Polignac number, because 7990659 - 2⁴ = 7990643 is a prime.

It is not an unprimeable number, because it can be changed into a prime (7990639) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 13912 + ... + 14474.

It is an arithmetic number, because the mean of its divisors is an integer number (513240).

Almost surely, 2^7990659 is an apocalyptic number.

7990659 is a deficient number, since it is larger than the sum of its proper divisors (4327101).

7990659 is a wasteful number, since it uses less digits than its factorization.

7990659 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 671 (or 668 counting only the distinct ones).

The product of its (nonzero) digits is 153090, while the sum is 45.

The square root of 7990659 is about 2826.7753713375. The cubic root of 7990659 is about 199.9221280170.

It can be divided in two parts, 7990 and 659, that added together give a square (8649 = 93²).

The spelling of 7990659 in words is "seven million, nine hundred ninety thousand, six hundred fifty-nine".