797979799 has 2 divisors, whose sum is σ = 797979800. Its totient is φ = 797979798.

The previous prime is 797979769. The next prime is 797979811. The reversal of 797979799 is 997979797.

797979799 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 797979799 - 2²⁵ = 764425367 is a prime.

It is a super-2 number, since 2×797979799² = 1273543519224160802, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (797979719) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 398989899 + 398989900.

It is an arithmetic number, because the mean of its divisors is an integer number (398989900).

Almost surely, 2^797979799 is an apocalyptic number.

797979799 is a deficient number, since it is larger than the sum of its proper divisors (1).

797979799 is an equidigital number, since it uses as much as digits as its factorization.

797979799 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 141776649, while the sum is 73.

The square root of 797979799 is about 28248.5362275641. The cubic root of 797979799 is about 927.5356961775.

It can be divided in two parts, 7979 and 79799, that added together give a palindrome (87778).

The spelling of 797979799 in words is "seven hundred ninety-seven million, nine hundred seventy-nine thousand, seven hundred ninety-nine".