2172299879 has 2 divisors, whose sum is σ = 2172299880. Its totient is φ = 2172299878.

The previous prime is 2172299873. The next prime is 2172299911. The reversal of 2172299879 is 9789922712.

2172299879 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2172299879 - 2⁴ = 2172299863 is a prime.

It is a super-3 number, since 3×2172299879³ (a number of 29 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2172299873) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1086149939 + 1086149940.

It is an arithmetic number, because the mean of its divisors is an integer number (1086149940).

Almost surely, 2^2172299879 is an apocalyptic number.

2172299879 is a deficient number, since it is larger than the sum of its proper divisors (1).

2172299879 is an equidigital number, since it uses as much as digits as its factorization.

2172299879 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2286144, while the sum is 56.

The square root of 2172299879 is about 46607.9379397973. The cubic root of 2172299879 is about 1295.1098089679.

The spelling of 2172299879 in words is "two billion, one hundred seventy-two million, two hundred ninety-nine thousand, eight hundred seventy-nine".