647434005 has 16 divisors (see below), whose sum is σ = 1036575360. Its totient is φ = 345071168.

The previous prime is 647434003. The next prime is 647434009. The reversal of 647434005 is 500434746.

It is a happy number.

647434005 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 647434005 - 2¹ = 647434003 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (647434003) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10816 + ... + 37574.

It is an arithmetic number, because the mean of its divisors is an integer number (64785960).

Almost surely, 2^647434005 is an apocalyptic number.

It is an amenable number.

647434005 is a deficient number, since it is larger than the sum of its proper divisors (389141355).

647434005 is a wasteful number, since it uses less digits than its factorization.

647434005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28380.

The product of its (nonzero) digits is 40320, while the sum is 33.

The square root of 647434005 is about 25444.7245023404. The cubic root of 647434005 is about 865.0977224844.

The spelling of 647434005 in words is "six hundred forty-seven million, four hundred thirty-four thousand, five".