79639321 has 8 divisors (see below), whose sum is σ = 81365760. Its totient is φ = 77925552.

The previous prime is 79639319. The next prime is 79639331. The reversal of 79639321 is 12393697.

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 79639321 - 2¹ = 79639319 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (79639331) 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, 10131 + ... + 16183.

It is an arithmetic number, because the mean of its divisors is an integer number (10170720).

Almost surely, 2^79639321 is an apocalyptic number.

It is an amenable number.

79639321 is a deficient number, since it is larger than the sum of its proper divisors (1726439).

79639321 is a wasteful number, since it uses less digits than its factorization.

79639321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6335.

The product of its digits is 61236, while the sum is 40.

The square root of 79639321 is about 8924.0865639011. The cubic root of 79639321 is about 430.2384129474.

The spelling of 79639321 in words is "seventy-nine million, six hundred thirty-nine thousand, three hundred twenty-one".