79823821199 has 2 divisors, whose sum is σ = 79823821200. Its totient is φ = 79823821198.

The previous prime is 79823821177. The next prime is 79823821223. The reversal of 79823821199 is 99112832897.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 79823821199 - 2¹² = 79823817103 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (79823821109) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39911910599 + 39911910600.

It is an arithmetic number, because the mean of its divisors is an integer number (39911910600).

Almost surely, 2^79823821199 is an apocalyptic number.

79823821199 is a deficient number, since it is larger than the sum of its proper divisors (1).

79823821199 is an equidigital number, since it uses as much as digits as its factorization.

79823821199 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3919104, while the sum is 59.

The spelling of 79823821199 in words is "seventy-nine billion, eight hundred twenty-three million, eight hundred twenty-one thousand, one hundred ninety-nine".