2694221791 has 2 divisors, whose sum is σ = 2694221792. Its totient is φ = 2694221790.

The previous prime is 2694221729. The next prime is 2694221819. The reversal of 2694221791 is 1971224962.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2694221791 - 2²⁹ = 2157350879 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2694221291) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1347110895 + 1347110896.

It is an arithmetic number, because the mean of its divisors is an integer number (1347110896).

Almost surely, 2^2694221791 is an apocalyptic number.

2694221791 is a deficient number, since it is larger than the sum of its proper divisors (1).

2694221791 is an equidigital number, since it uses as much as digits as its factorization.

2694221791 is an evil number, because the sum of its binary digits is even.

The product of its digits is 108864, while the sum is 43.

The square root of 2694221791 is about 51905.8936056398. The cubic root of 2694221791 is about 1391.4826046951.

The spelling of 2694221791 in words is "two billion, six hundred ninety-four million, two hundred twenty-one thousand, seven hundred ninety-one".