79879823 has 4 divisors (see below), whose sum is σ = 80891040. Its totient is φ = 78868608.

The previous prime is 79879801. The next prime is 79879831. The reversal of 79879823 is 32897897.

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 79879823 - 2¹² = 79875727 is a prime.

It is a super-2 number, since 2×79879823² = 12761572245022658, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (79879843) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 505490 + ... + 505647.

It is an arithmetic number, because the mean of its divisors is an integer number (20222760).

Almost surely, 2^79879823 is an apocalyptic number.

79879823 is a deficient number, since it is larger than the sum of its proper divisors (1011217).

79879823 is a wasteful number, since it uses less digits than its factorization.

79879823 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1011216.

The product of its digits is 1524096, while the sum is 53.

The square root of 79879823 is about 8937.5512865661. The cubic root of 79879823 is about 430.6710686283.

The spelling of 79879823 in words is "seventy-nine million, eight hundred seventy-nine thousand, eight hundred twenty-three".