79797859 has 2 divisors, whose sum is σ = 79797860. Its totient is φ = 79797858.

The previous prime is 79797829. The next prime is 79797877. The reversal of 79797859 is 95879797.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 79797859 - 2¹¹ = 79795811 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 79797797 and 79797806.

It is not a weakly prime, because it can be changed into another prime (79797829) 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 as a sum of consecutive naturals, namely, 39898929 + 39898930.

It is an arithmetic number, because the mean of its divisors is an integer number (39898930).

Almost surely, 2^79797859 is an apocalyptic number.

79797859 is a deficient number, since it is larger than the sum of its proper divisors (1).

79797859 is an equidigital number, since it uses as much as digits as its factorization.

79797859 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 10001880, while the sum is 61.

The square root of 79797859 is about 8932.9647374206. The cubic root of 79797859 is about 430.5237155899.

It can be divided in two parts, 79797 and 859, that added together give a square (80656 = 284²).

The spelling of 79797859 in words is "seventy-nine million, seven hundred ninety-seven thousand, eight hundred fifty-nine".