2129208791 has 2 divisors, whose sum is σ = 2129208792. Its totient is φ = 2129208790.

The previous prime is 2129208773. The next prime is 2129208821. The reversal of 2129208791 is 1978029212.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2129208791 - 2¹⁴ = 2129192407 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2129208701) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1064604395 + 1064604396.

It is an arithmetic number, because the mean of its divisors is an integer number (1064604396).

Almost surely, 2^2129208791 is an apocalyptic number.

2129208791 is a deficient number, since it is larger than the sum of its proper divisors (1).

2129208791 is an equidigital number, since it uses as much as digits as its factorization.

2129208791 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 36288, while the sum is 41.

The square root of 2129208791 is about 46143.3504526925. The cubic root of 2129208791 is about 1286.4890188558.

The spelling of 2129208791 in words is "two billion, one hundred twenty-nine million, two hundred eight thousand, seven hundred ninety-one".