7879985 has 8 divisors (see below), whose sum is σ = 9585960. Its totient is φ = 6217344.

The previous prime is 7879979. The next prime is 7879999. The reversal of 7879985 is 5899787.

It can be written as a sum of positive squares in 4 ways, for example, as 889249 + 6990736 = 943^2 + 2644^2 .

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 7879985 - 2¹⁰ = 7878961 is a prime.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10430 + ... + 11159.

It is an arithmetic number, because the mean of its divisors is an integer number (1198245).

Almost surely, 2^7879985 is an apocalyptic number.

It is an amenable number.

7879985 is a deficient number, since it is larger than the sum of its proper divisors (1705975).

7879985 is a wasteful number, since it uses less digits than its factorization.

7879985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21667.

The product of its digits is 1270080, while the sum is 53.

The square root of 7879985 is about 2807.1310977580. The cubic root of 7879985 is about 198.9948316461.

The spelling of 7879985 in words is "seven million, eight hundred seventy-nine thousand, nine hundred eighty-five".