647252867 has 8 divisors (see below), whose sum is σ = 675682560. Its totient is φ = 618847240.

The previous prime is 647252857. The next prime is 647252929. The reversal of 647252867 is 768252746.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 647252867 - 2²⁰ = 646204291 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (647252857) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 68984 + ... + 77802.

It is an arithmetic number, because the mean of its divisors is an integer number (84460320).

Almost surely, 2^647252867 is an apocalyptic number.

647252867 is a deficient number, since it is larger than the sum of its proper divisors (28429693).

647252867 is a wasteful number, since it uses less digits than its factorization.

647252867 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12033.

The product of its digits is 1128960, while the sum is 47.

The square root of 647252867 is about 25441.1648121701. The cubic root of 647252867 is about 865.0170364292.

The spelling of 647252867 in words is "six hundred forty-seven million, two hundred fifty-two thousand, eight hundred sixty-seven".