2857718891 has 2 divisors, whose sum is σ = 2857718892. Its totient is φ = 2857718890.

The previous prime is 2857718879. The next prime is 2857718917. The reversal of 2857718891 is 1988177582.

2857718891 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 2857718891 - 2⁶ = 2857718827 is a prime.

It is not a weakly prime, because it can be changed into another prime (2857718861) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1428859445 + 1428859446.

It is an arithmetic number, because the mean of its divisors is an integer number (1428859446).

Almost surely, 2^2857718891 is an apocalyptic number.

2857718891 is a deficient number, since it is larger than the sum of its proper divisors (1).

2857718891 is an equidigital number, since it uses as much as digits as its factorization.

2857718891 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2257920, while the sum is 56.

The square root of 2857718891 is about 53457.6364142673. The cubic root of 2857718891 is about 1419.0787668527.

The spelling of 2857718891 in words is "two billion, eight hundred fifty-seven million, seven hundred eighteen thousand, eight hundred ninety-one".