863649223 has 2 divisors, whose sum is σ = 863649224. Its totient is φ = 863649222.

The previous prime is 863649221. The next prime is 863649247. The reversal of 863649223 is 322946368.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 863649223 - 2¹ = 863649221 is a prime.

Together with 863649221, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 863649223.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (863649221) 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, 431824611 + 431824612.

It is an arithmetic number, because the mean of its divisors is an integer number (431824612).

Almost surely, 2^863649223 is an apocalyptic number.

863649223 is a deficient number, since it is larger than the sum of its proper divisors (1).

863649223 is an equidigital number, since it uses as much as digits as its factorization.

863649223 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 373248, while the sum is 43.

The square root of 863649223 is about 29387.9094697122. The cubic root of 863649223 is about 952.3117193404.

The spelling of 863649223 in words is "eight hundred sixty-three million, six hundred forty-nine thousand, two hundred twenty-three".