2894782021 has 2 divisors, whose sum is σ = 2894782022. Its totient is φ = 2894782020.

The previous prime is 2894782013. The next prime is 2894782067. The reversal of 2894782021 is 1202874982.

2894782021 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2890245121 + 4536900 = 53761^2 + 2130^2 .

It is a cyclic number.

It is not a de Polignac number, because 2894782021 - 2³ = 2894782013 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2894782421) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1447391010 + 1447391011.

It is an arithmetic number, because the mean of its divisors is an integer number (1447391011).

Almost surely, 2^2894782021 is an apocalyptic number.

It is an amenable number.

2894782021 is a deficient number, since it is larger than the sum of its proper divisors (1).

2894782021 is an equidigital number, since it uses as much as digits as its factorization.

2894782021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 129024, while the sum is 43.

The square root of 2894782021 is about 53803.1785399339. The cubic root of 2894782021 is about 1425.1873390308.

The spelling of 2894782021 in words is "two billion, eight hundred ninety-four million, seven hundred eighty-two thousand, twenty-one".