647412345 has 80 divisors (see below), whose sum is σ = 1202116608. Its totient is φ = 333123840.

The previous prime is 647412341. The next prime is 647412373. The reversal of 647412345 is 543214746.

647412345 is a `hidden beast` number, since 647 + 4 + 1 + 2 + 3 + 4 + 5 = 666.

It is not a de Polignac number, because 647412345 - 2² = 647412341 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (647412341) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 2108682 + ... + 2108988.

Almost surely, 2^647412345 is an apocalyptic number.

It is an amenable number.

647412345 is a deficient number, since it is larger than the sum of its proper divisors (554704263).

647412345 is a wasteful number, since it uses less digits than its factorization.

647412345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 492 (or 483 counting only the distinct ones).

The product of its digits is 80640, while the sum is 36.

The square root of 647412345 is about 25444.2988702774. The cubic root of 647412345 is about 865.0880750529.

The spelling of 647412345 in words is "six hundred forty-seven million, four hundred twelve thousand, three hundred forty-five".