2797191791 has 2 divisors, whose sum is σ = 2797191792. Its totient is φ = 2797191790.

The previous prime is 2797191773. The next prime is 2797191821. The reversal of 2797191791 is 1971917972.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2797191791 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2797191701) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1398595895 + 1398595896.

It is an arithmetic number, because the mean of its divisors is an integer number (1398595896).

Almost surely, 2^2797191791 is an apocalyptic number.

2797191791 is a deficient number, since it is larger than the sum of its proper divisors (1).

2797191791 is an equidigital number, since it uses as much as digits as its factorization.

2797191791 is an evil number, because the sum of its binary digits is even.

The product of its digits is 500094, while the sum is 53.

The square root of 2797191791 is about 52888.4844838647. The cubic root of 2797191791 is about 1408.9883914721.

The spelling of 2797191791 in words is "two billion, seven hundred ninety-seven million, one hundred ninety-one thousand, seven hundred ninety-one".