2168264389 has 2 divisors, whose sum is σ = 2168264390. Its totient is φ = 2168264388.

The previous prime is 2168264359. The next prime is 2168264407. The reversal of 2168264389 is 9834628612.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2166902500 + 1361889 = 46550^2 + 1167^2 .

It is a cyclic number.

It is not a de Polignac number, because 2168264389 - 2⁷ = 2168264261 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2168264359) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1084132194 + 1084132195.

It is an arithmetic number, because the mean of its divisors is an integer number (1084132195).

Almost surely, 2^2168264389 is an apocalyptic number.

It is an amenable number.

2168264389 is a deficient number, since it is larger than the sum of its proper divisors (1).

2168264389 is an equidigital number, since it uses as much as digits as its factorization.

2168264389 is an evil number, because the sum of its binary digits is even.

The product of its digits is 995328, while the sum is 49.

The square root of 2168264389 is about 46564.6259407289. The cubic root of 2168264389 is about 1294.3073349867.

The spelling of 2168264389 in words is "two billion, one hundred sixty-eight million, two hundred sixty-four thousand, three hundred eighty-nine".