863904289 has 2 divisors, whose sum is σ = 863904290. Its totient is φ = 863904288.

The previous prime is 863904281. The next prime is 863904329. The reversal of 863904289 is 982409368.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 667343889 + 196560400 = 25833^2 + 14020^2 .

It is a cyclic number.

It is not a de Polignac number, because 863904289 - 2³ = 863904281 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (863904281) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 431952144 + 431952145.

It is an arithmetic number, because the mean of its divisors is an integer number (431952145).

Almost surely, 2^863904289 is an apocalyptic number.

It is an amenable number.

863904289 is a deficient number, since it is larger than the sum of its proper divisors (1).

863904289 is an equidigital number, since it uses as much as digits as its factorization.

863904289 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 746496, while the sum is 49.

The square root of 863904289 is about 29392.2487911354. The cubic root of 863904289 is about 952.4054604974.

The spelling of 863904289 in words is "eight hundred sixty-three million, nine hundred four thousand, two hundred eighty-nine".