864802247 has 2 divisors, whose sum is σ = 864802248. Its totient is φ = 864802246.

The previous prime is 864802201. The next prime is 864802249. The reversal of 864802247 is 742208468.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 864802247 - 2⁸ = 864801991 is a prime.

Together with 864802249, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (864802249) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 432401123 + 432401124.

It is an arithmetic number, because the mean of its divisors is an integer number (432401124).

Almost surely, 2^864802247 is an apocalyptic number.

864802247 is a deficient number, since it is larger than the sum of its proper divisors (1).

864802247 is an equidigital number, since it uses as much as digits as its factorization.

864802247 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 172032, while the sum is 41.

The square root of 864802247 is about 29407.5202456787. The cubic root of 864802247 is about 952.7353288150.

The spelling of 864802247 in words is "eight hundred sixty-four million, eight hundred two thousand, two hundred forty-seven".