2897783891 has 2 divisors, whose sum is σ = 2897783892. Its totient is φ = 2897783890.

The previous prime is 2897783881. The next prime is 2897783927. The reversal of 2897783891 is 1983877982.

2897783891 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 is a cyclic number.

It is not a de Polignac number, because 2897783891 - 2⁶ = 2897783827 is a prime.

It is not a weakly prime, because it can be changed into another prime (2897783821) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1448891945 + 1448891946.

It is an arithmetic number, because the mean of its divisors is an integer number (1448891946).

Almost surely, 2^2897783891 is an apocalyptic number.

2897783891 is a deficient number, since it is larger than the sum of its proper divisors (1).

2897783891 is an equidigital number, since it uses as much as digits as its factorization.

2897783891 is an evil number, because the sum of its binary digits is even.

The product of its digits is 12192768, while the sum is 62.

The square root of 2897783891 is about 53831.0680834033. The cubic root of 2897783891 is about 1425.6798054879.

The spelling of 2897783891 in words is "two billion, eight hundred ninety-seven million, seven hundred eighty-three thousand, eight hundred ninety-one".