864957247 has 24 divisors (see below), whose sum is σ = 1104436256. Its totient is φ = 662904000.

The previous prime is 864957241. The next prime is 864957253. The reversal of 864957247 is 742759468.

It is an interprime number because it is at equal distance from previous prime (864957241) and next prime (864957253).

It is not a de Polignac number, because 864957247 - 2³ = 864957239 is a prime.

It is a zygodrome in base 2.

It is a junction number, because it is equal to n+sod(n) for n = 864957194 and 864957203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (864957241) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 43297 + ... + 60037.

Almost surely, 2^864957247 is an apocalyptic number.

864957247 is a deficient number, since it is larger than the sum of its proper divisors (239479009).

864957247 is a wasteful number, since it uses less digits than its factorization.

864957247 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16831 (or 16820 counting only the distinct ones).

The product of its digits is 3386880, while the sum is 52.

The square root of 864957247 is about 29410.1555079194. The cubic root of 864957247 is about 952.7922455474.

The spelling of 864957247 in words is "eight hundred sixty-four million, nine hundred fifty-seven thousand, two hundred forty-seven".