868198291 has 2 divisors, whose sum is σ = 868198292. Its totient is φ = 868198290.

The previous prime is 868198277. The next prime is 868198297. The reversal of 868198291 is 192891868.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 868198291 - 2⁹ = 868197779 is a prime.

It is not a weakly prime, because it can be changed into another prime (868198297) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 434099145 + 434099146.

It is an arithmetic number, because the mean of its divisors is an integer number (434099146).

Almost surely, 2^868198291 is an apocalyptic number.

868198291 is a deficient number, since it is larger than the sum of its proper divisors (1).

868198291 is an equidigital number, since it uses as much as digits as its factorization.

868198291 is an evil number, because the sum of its binary digits is even.

The product of its digits is 497664, while the sum is 52.

The square root of 868198291 is about 29465.2047506886. The cubic root of 868198291 is about 953.9808178104.

The spelling of 868198291 in words is "eight hundred sixty-eight million, one hundred ninety-eight thousand, two hundred ninety-one".