863649247 has 2 divisors, whose sum is σ = 863649248. Its totient is φ = 863649246.

The previous prime is 863649223. The next prime is 863649329. The reversal of 863649247 is 742946368.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 863649247 - 2¹¹ = 863647199 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 863649247.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (863649547) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 431824623 + 431824624.

It is an arithmetic number, because the mean of its divisors is an integer number (431824624).

Almost surely, 2^863649247 is an apocalyptic number.

863649247 is a deficient number, since it is larger than the sum of its proper divisors (1).

863649247 is an equidigital number, since it uses as much as digits as its factorization.

863649247 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1741824, while the sum is 49.

The square root of 863649247 is about 29387.9098780434. The cubic root of 863649247 is about 952.3117281617.

The spelling of 863649247 in words is "eight hundred sixty-three million, six hundred forty-nine thousand, two hundred forty-seven".