79321823 has 4 divisors (see below), whose sum is σ = 90653520. Its totient is φ = 67990128.

The previous prime is 79321793. The next prime is 79321829. The reversal of 79321823 is 32812397.

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 79321823 - 2¹² = 79317727 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 (79321829) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5665838 + ... + 5665851.

It is an arithmetic number, because the mean of its divisors is an integer number (22663380).

Almost surely, 2^79321823 is an apocalyptic number.

79321823 is a deficient number, since it is larger than the sum of its proper divisors (11331697).

79321823 is a wasteful number, since it uses less digits than its factorization.

79321823 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11331696.

The product of its digits is 18144, while the sum is 35.

The square root of 79321823 is about 8906.2799753882. The cubic root of 79321823 is about 429.6659077890.

The spelling of 79321823 in words is "seventy-nine million, three hundred twenty-one thousand, eight hundred twenty-three".