863871199 has 2 divisors, whose sum is σ = 863871200. Its totient is φ = 863871198.

The previous prime is 863871193. The next prime is 863871223. The reversal of 863871199 is 991178368.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 863871199 - 2⁹ = 863870687 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (863871193) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 431935599 + 431935600.

It is an arithmetic number, because the mean of its divisors is an integer number (431935600).

Almost surely, 2^863871199 is an apocalyptic number.

863871199 is a deficient number, since it is larger than the sum of its proper divisors (1).

863871199 is an equidigital number, since it uses as much as digits as its factorization.

863871199 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 653184, while the sum is 52.

The square root of 863871199 is about 29391.6858822355. The cubic root of 863871199 is about 952.3933003930.

The spelling of 863871199 in words is "eight hundred sixty-three million, eight hundred seventy-one thousand, one hundred ninety-nine".