2825791721 has 2 divisors, whose sum is σ = 2825791722. Its totient is φ = 2825791720.

The previous prime is 2825791679. The next prime is 2825791723. The reversal of 2825791721 is 1271975282.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2152960000 + 672831721 = 46400^2 + 25939^2 .

It is a cyclic number.

It is not a de Polignac number, because 2825791721 - 2¹⁰ = 2825790697 is a prime.

Together with 2825791723, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (2825791723) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1412895860 + 1412895861.

It is an arithmetic number, because the mean of its divisors is an integer number (1412895861).

Almost surely, 2^2825791721 is an apocalyptic number.

It is an amenable number.

2825791721 is a deficient number, since it is larger than the sum of its proper divisors (1).

2825791721 is an equidigital number, since it uses as much as digits as its factorization.

2825791721 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 141120, while the sum is 44.

The square root of 2825791721 is about 53158.1764265856. The cubic root of 2825791721 is about 1413.7741919251.

The spelling of 2825791721 in words is "two billion, eight hundred twenty-five million, seven hundred ninety-one thousand, seven hundred twenty-one".