2857217893 has 2 divisors, whose sum is σ = 2857217894. Its totient is φ = 2857217892.

The previous prime is 2857217833. The next prime is 2857217903. The reversal of 2857217893 is 3987127582.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2782879009 + 74338884 = 52753^2 + 8622^2 .

It is a cyclic number.

It is not a de Polignac number, because 2857217893 - 2²⁹ = 2320346981 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2857217893.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2857217833) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1428608946 + 1428608947.

It is an arithmetic number, because the mean of its divisors is an integer number (1428608947).

Almost surely, 2^2857217893 is an apocalyptic number.

It is an amenable number.

2857217893 is a deficient number, since it is larger than the sum of its proper divisors (1).

2857217893 is an equidigital number, since it uses as much as digits as its factorization.

2857217893 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1693440, while the sum is 52.

The square root of 2857217893 is about 53452.9502740494. The cubic root of 2857217893 is about 1418.9958339026.

The spelling of 2857217893 in words is "two billion, eight hundred fifty-seven million, two hundred seventeen thousand, eight hundred ninety-three".