864747247 has 64 divisors (see below), whose sum is σ = 1169280000. Its totient is φ = 633515904.

The previous prime is 864747241. The next prime is 864747251. The reversal of 864747247 is 742747468.

It is not a de Polignac number, because 864747247 - 2⁷ = 864747119 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (49).

It is a self number, because there is not a number n which added to its sum of digits gives 864747247.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (864747241) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 4998453 + ... + 4998625.

It is an arithmetic number, because the mean of its divisors is an integer number (18270000).

Almost surely, 2^864747247 is an apocalyptic number.

864747247 is a deficient number, since it is larger than the sum of its proper divisors (304532753).

864747247 is a wasteful number, since it uses less digits than its factorization.

864747247 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 285 (or 271 counting only the distinct ones).

The product of its digits is 2107392, while the sum is 49.

The square root of 864747247 is about 29406.5850958591. The cubic root of 864747247 is about 952.7151309204.

The spelling of 864747247 in words is "eight hundred sixty-four million, seven hundred forty-seven thousand, two hundred forty-seven".