2129945297 has 2 divisors, whose sum is σ = 2129945298. Its totient is φ = 2129945296.

The previous prime is 2129945269. The next prime is 2129945299. The reversal of 2129945297 is 7925499212.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1456490896 + 673454401 = 38164^2 + 25951^2 .

It is a cyclic number.

It is not a de Polignac number, because 2129945297 - 2¹² = 2129941201 is a prime.

Together with 2129945299, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (2129945299) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1064972648 + 1064972649.

It is an arithmetic number, because the mean of its divisors is an integer number (1064972649).

Almost surely, 2^2129945297 is an apocalyptic number.

It is an amenable number.

2129945297 is a deficient number, since it is larger than the sum of its proper divisors (1).

2129945297 is an equidigital number, since it uses as much as digits as its factorization.

2129945297 is an evil number, because the sum of its binary digits is even.

The product of its digits is 816480, while the sum is 50.

The square root of 2129945297 is about 46151.3303925250. The cubic root of 2129945297 is about 1286.6373364933.

The spelling of 2129945297 in words is "two billion, one hundred twenty-nine million, nine hundred forty-five thousand, two hundred ninety-seven".