79223839 has 2 divisors, whose sum is σ = 79223840. Its totient is φ = 79223838.

The previous prime is 79223813. The next prime is 79223873. The reversal of 79223839 is 93832297.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-79223839 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 79223795 and 79223804.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (79223899) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39611919 + 39611920.

It is an arithmetic number, because the mean of its divisors is an integer number (39611920).

Almost surely, 2^79223839 is an apocalyptic number.

79223839 is a deficient number, since it is larger than the sum of its proper divisors (1).

79223839 is an equidigital number, since it uses as much as digits as its factorization.

79223839 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 163296, while the sum is 43.

The square root of 79223839 is about 8900.7774379545. Note that the first 3 decimals coincide. The cubic root of 79223839 is about 429.4889168520.

The spelling of 79223839 in words is "seventy-nine million, two hundred twenty-three thousand, eight hundred thirty-nine".