2797967521 has 2 divisors, whose sum is σ = 2797967522. Its totient is φ = 2797967520.

The previous prime is 2797967519. The next prime is 2797967539. The reversal of 2797967521 is 1257697972.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2039515921 + 758451600 = 45161^2 + 27540^2 .

It is a cyclic number.

It is not a de Polignac number, because 2797967521 - 2¹ = 2797967519 is a prime.

Together with 2797967519, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (2797968521) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1398983760 + 1398983761.

It is an arithmetic number, because the mean of its divisors is an integer number (1398983761).

Almost surely, 2^2797967521 is an apocalyptic number.

It is an amenable number.

2797967521 is a deficient number, since it is larger than the sum of its proper divisors (1).

2797967521 is an equidigital number, since it uses as much as digits as its factorization.

2797967521 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3333960, while the sum is 55.

The square root of 2797967521 is about 52895.8176134938. The cubic root of 2797967521 is about 1409.1186284650.

The spelling of 2797967521 in words is "two billion, seven hundred ninety-seven million, nine hundred sixty-seven thousand, five hundred twenty-one".