8079639 has 4 divisors (see below), whose sum is σ = 10772856. Its totient is φ = 5386424.

The previous prime is 8079581. The next prime is 8079649. The reversal of 8079639 is 9369708.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 8079639 - 2¹⁶ = 8014103 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 8079639.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8079649) 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 3 ways as a sum of consecutive naturals, for example, 1346604 + ... + 1346609.

It is an arithmetic number, because the mean of its divisors is an integer number (2693214).

Almost surely, 2^8079639 is an apocalyptic number.

8079639 is a deficient number, since it is larger than the sum of its proper divisors (2693217).

8079639 is a wasteful number, since it uses less digits than its factorization.

8079639 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2693216.

The product of its (nonzero) digits is 81648, while the sum is 42.

The square root of 8079639 is about 2842.4705803227. The cubic root of 8079639 is about 200.6614682205.

The spelling of 8079639 in words is "eight million, seventy-nine thousand, six hundred thirty-nine".