2847922721 has 16 divisors (see below), whose sum is σ = 3397918464. Its totient is φ = 2333817024.

The previous prime is 2847922717. The next prime is 2847922733. The reversal of 2847922721 is 1272297482.

It is not a de Polignac number, because 2847922721 - 2² = 2847922717 is a prime.

It is a super-2 number, since 2×2847922721² = 16221327649576087682, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2847922321) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 570191 + ... + 575163.

It is an arithmetic number, because the mean of its divisors is an integer number (212369904).

Almost surely, 2^2847922721 is an apocalyptic number.

It is an amenable number.

2847922721 is a deficient number, since it is larger than the sum of its proper divisors (549995743).

2847922721 is a wasteful number, since it uses less digits than its factorization.

2847922721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8560.

The product of its digits is 225792, while the sum is 44.

The square root of 2847922721 is about 53365.9322133512. The cubic root of 2847922721 is about 1417.4553914297.

The spelling of 2847922721 in words is "two billion, eight hundred forty-seven million, nine hundred twenty-two thousand, seven hundred twenty-one".