2171000791 has 2 divisors, whose sum is σ = 2171000792. Its totient is φ = 2171000790.

The previous prime is 2171000779. The next prime is 2171000879. The reversal of 2171000791 is 1970001712.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2171000791 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2171000771) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1085500395 + 1085500396.

It is an arithmetic number, because the mean of its divisors is an integer number (1085500396).

Almost surely, 2^2171000791 is an apocalyptic number.

2171000791 is a deficient number, since it is larger than the sum of its proper divisors (1).

2171000791 is an equidigital number, since it uses as much as digits as its factorization.

2171000791 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 882, while the sum is 28.

The square root of 2171000791 is about 46593.9995171052. Note that the first 3 decimals coincide. The cubic root of 2171000791 is about 1294.8515884642.

The spelling of 2171000791 in words is "two billion, one hundred seventy-one million, seven hundred ninety-one", and thus it is an aban number.