647434545 has 16 divisors (see below), whose sum is σ = 1096830720. Its totient is φ = 324986624.

The previous prime is 647434507. The next prime is 647434549. The reversal of 647434545 is 545434746.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 647434545 - 2⁸ = 647434289 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 647434497 and 647434506.

It is not an unprimeable number, because it can be changed into a prime (647434549) 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, 1269225 + ... + 1269734.

It is an arithmetic number, because the mean of its divisors is an integer number (68551920).

Almost surely, 2^647434545 is an apocalyptic number.

It is an amenable number.

647434545 is a deficient number, since it is larger than the sum of its proper divisors (449396175).

647434545 is a wasteful number, since it uses less digits than its factorization.

647434545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2538984.

The product of its digits is 806400, while the sum is 42.

The square root of 647434545 is about 25444.7351135751. The cubic root of 647434545 is about 865.0979629993.

The spelling of 647434545 in words is "six hundred forty-seven million, four hundred thirty-four thousand, five hundred forty-five".