863115287 has 2 divisors, whose sum is σ = 863115288. Its totient is φ = 863115286.

The previous prime is 863115251. The next prime is 863115311. The reversal of 863115287 is 782511368.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 863115287 - 2²² = 858920983 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (863117287) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 431557643 + 431557644.

It is an arithmetic number, because the mean of its divisors is an integer number (431557644).

Almost surely, 2^863115287 is an apocalyptic number.

863115287 is a deficient number, since it is larger than the sum of its proper divisors (1).

863115287 is an equidigital number, since it uses as much as digits as its factorization.

863115287 is an evil number, because the sum of its binary digits is even.

The product of its digits is 80640, while the sum is 41.

The square root of 863115287 is about 29378.8237851688. The cubic root of 863115287 is about 952.1154288721.

The spelling of 863115287 in words is "eight hundred sixty-three million, one hundred fifteen thousand, two hundred eighty-seven".