647234747 has 16 divisors (see below), whose sum is σ = 675682560. Its totient is φ = 619435872.

The previous prime is 647234741. The next prime is 647234801. The reversal of 647234747 is 747432746.

It is a cyclic number.

It is not a de Polignac number, because 647234747 - 2⁶ = 647234683 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 647234698 and 647234707.

It is not an unprimeable number, because it can be changed into a prime (647234741) 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 15 ways as a sum of consecutive naturals, for example, 1286498 + ... + 1287000.

It is an arithmetic number, because the mean of its divisors is an integer number (42230160).

Almost surely, 2^647234747 is an apocalyptic number.

647234747 is a deficient number, since it is larger than the sum of its proper divisors (28447813).

647234747 is a wasteful number, since it uses less digits than its factorization.

647234747 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1042.

The product of its digits is 790272, while the sum is 44.

The square root of 647234747 is about 25440.8086939075. The cubic root of 647234747 is about 865.0089642338.

The spelling of 647234747 in words is "six hundred forty-seven million, two hundred thirty-four thousand, seven hundred forty-seven".