2797728457 has 2 divisors, whose sum is σ = 2797728458. Its totient is φ = 2797728456.

The previous prime is 2797728371. The next prime is 2797728469. The reversal of 2797728457 is 7548277972.

2797728457 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2697348096 + 100380361 = 51936^2 + 10019^2 .

It is a cyclic number.

It is not a de Polignac number, because 2797728457 - 2²³ = 2789339849 is a prime.

It is not a weakly prime, because it can be changed into another prime (2797728757) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1398864228 + 1398864229.

It is an arithmetic number, because the mean of its divisors is an integer number (1398864229).

Almost surely, 2^2797728457 is an apocalyptic number.

It is an amenable number.

2797728457 is a deficient number, since it is larger than the sum of its proper divisors (1).

2797728457 is an equidigital number, since it uses as much as digits as its factorization.

2797728457 is an evil number, because the sum of its binary digits is even.

The product of its digits is 13829760, while the sum is 58.

The square root of 2797728457 is about 52893.5578024394. The cubic root of 2797728457 is about 1409.0784946741.

The spelling of 2797728457 in words is "two billion, seven hundred ninety-seven million, seven hundred twenty-eight thousand, four hundred fifty-seven".