2781254297 has 2 divisors, whose sum is σ = 2781254298. Its totient is φ = 2781254296.

The previous prime is 2781254293. The next prime is 2781254299. The reversal of 2781254297 is 7924521872.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2316593161 + 464661136 = 48131^2 + 21556^2 .

It is a cyclic number.

It is not a de Polignac number, because 2781254297 - 2² = 2781254293 is a prime.

Together with 2781254299, 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 (2781254293) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1390627148 + 1390627149.

It is an arithmetic number, because the mean of its divisors is an integer number (1390627149).

Almost surely, 2^2781254297 is an apocalyptic number.

It is an amenable number.

2781254297 is a deficient number, since it is larger than the sum of its proper divisors (1).

2781254297 is an equidigital number, since it uses as much as digits as its factorization.

2781254297 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 564480, while the sum is 47.

The square root of 2781254297 is about 52737.5985137738. The cubic root of 2781254297 is about 1406.3073063277.

The spelling of 2781254297 in words is "two billion, seven hundred eighty-one million, two hundred fifty-four thousand, two hundred ninety-seven".