2722856789 has 2 divisors, whose sum is σ = 2722856790. Its totient is φ = 2722856788.

The previous prime is 2722856767. The next prime is 2722856791. The reversal of 2722856789 is 9876582272.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2356325764 + 366531025 = 48542^2 + 19145^2 .

It is a cyclic number.

It is not a de Polignac number, because 2722856789 - 2⁸ = 2722856533 is a prime.

Together with 2722856791, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2722856729) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1361428394 + 1361428395.

It is an arithmetic number, because the mean of its divisors is an integer number (1361428395).

Almost surely, 2^2722856789 is an apocalyptic number.

It is an amenable number.

2722856789 is a deficient number, since it is larger than the sum of its proper divisors (1).

2722856789 is an equidigital number, since it uses as much as digits as its factorization.

2722856789 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6773760, while the sum is 56.

The square root of 2722856789 is about 52181.0002682969. Note that the first 3 decimals coincide. The cubic root of 2722856789 is about 1396.3949406036.

The spelling of 2722856789 in words is "two billion, seven hundred twenty-two million, eight hundred fifty-six thousand, seven hundred eighty-nine".