863135291 has 2 divisors, whose sum is σ = 863135292. Its totient is φ = 863135290.

The previous prime is 863135269. The next prime is 863135309. The reversal of 863135291 is 192531368.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 863135291 - 2⁶ = 863135227 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (863155291) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 431567645 + 431567646.

It is an arithmetic number, because the mean of its divisors is an integer number (431567646).

Almost surely, 2^863135291 is an apocalyptic number.

863135291 is a deficient number, since it is larger than the sum of its proper divisors (1).

863135291 is an equidigital number, since it uses as much as digits as its factorization.

863135291 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 38880, while the sum is 38.

The square root of 863135291 is about 29379.1642324965. The cubic root of 863135291 is about 952.1227843862.

The spelling of 863135291 in words is "eight hundred sixty-three million, one hundred thirty-five thousand, two hundred ninety-one".