2797191797 has 4 divisors (see below), whose sum is σ = 2798024460. Its totient is φ = 2796359136.

The previous prime is 2797191791. The next prime is 2797191821. The reversal of 2797191797 is 7971917972.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1356154276 + 1441037521 = 36826^2 + 37961^2 .

It is a cyclic number.

It is not a de Polignac number, because 2797191797 - 2⁸ = 2797191541 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2797191791) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 411272 + ... + 418017.

It is an arithmetic number, because the mean of its divisors is an integer number (699506115).

Almost surely, 2^2797191797 is an apocalyptic number.

It is an amenable number.

2797191797 is a deficient number, since it is larger than the sum of its proper divisors (832663).

2797191797 is an equidigital number, since it uses as much as digits as its factorization.

2797191797 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 832662.

The product of its digits is 3500658, while the sum is 59.

The square root of 2797191797 is about 52888.4845405878. The cubic root of 2797191797 is about 1408.9883924795.

The spelling of 2797191797 in words is "two billion, seven hundred ninety-seven million, one hundred ninety-one thousand, seven hundred ninety-seven".