2129564317 has 2 divisors, whose sum is σ = 2129564318. Its totient is φ = 2129564316.

The previous prime is 2129564303. The next prime is 2129564323. The reversal of 2129564317 is 7134659212.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1301333476 + 828230841 = 36074^2 + 28779^2 .

It is a cyclic number.

It is not a de Polignac number, because 2129564317 - 2²³ = 2121175709 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2129564317.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2129564357) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1064782158 + 1064782159.

It is an arithmetic number, because the mean of its divisors is an integer number (1064782159).

Almost surely, 2^2129564317 is an apocalyptic number.

It is an amenable number.

2129564317 is a deficient number, since it is larger than the sum of its proper divisors (1).

2129564317 is an equidigital number, since it uses as much as digits as its factorization.

2129564317 is an evil number, because the sum of its binary digits is even.

The product of its digits is 90720, while the sum is 40.

The square root of 2129564317 is about 46147.2026996220. The cubic root of 2129564317 is about 1286.5606189798.

The spelling of 2129564317 in words is "two billion, one hundred twenty-nine million, five hundred sixty-four thousand, three hundred seventeen".