2181790799 has 2 divisors, whose sum is σ = 2181790800. Its totient is φ = 2181790798.

The previous prime is 2181790783. The next prime is 2181790801. The reversal of 2181790799 is 9970971812.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2181790799 - 2⁴ = 2181790783 is a prime.

It is a super-2 number, since 2×2181790799² = 9520422181202116802, which contains 22 as substring.

Together with 2181790801, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2181790799.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2181792799) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1090895399 + 1090895400.

It is an arithmetic number, because the mean of its divisors is an integer number (1090895400).

Almost surely, 2^2181790799 is an apocalyptic number.

2181790799 is a deficient number, since it is larger than the sum of its proper divisors (1).

2181790799 is an equidigital number, since it uses as much as digits as its factorization.

2181790799 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 571536, while the sum is 53.

The square root of 2181790799 is about 46709.6435332149. The cubic root of 2181790799 is about 1296.9932084976.

The spelling of 2181790799 in words is "two billion, one hundred eighty-one million, seven hundred ninety thousand, seven hundred ninety-nine".