647437473 has 12 divisors (see below), whose sum is σ = 937797120. Its totient is φ = 430420536.

The previous prime is 647437471. The next prime is 647437481. The reversal of 647437473 is 374734746.

It is not a de Polignac number, because 647437473 - 2¹ = 647437471 is a prime.

It is not an unprimeable number, because it can be changed into a prime (647437471) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 96961 + ... + 103422.

It is an arithmetic number, because the mean of its divisors is an integer number (78149760).

Almost surely, 2^647437473 is an apocalyptic number.

It is an amenable number.

647437473 is a deficient number, since it is larger than the sum of its proper divisors (290359647).

647437473 is a wasteful number, since it uses less digits than its factorization.

647437473 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 200748 (or 200745 counting only the distinct ones).

The product of its digits is 1185408, while the sum is 45.

The square root of 647437473 is about 25444.7926499706. The cubic root of 647437473 is about 865.0992671224.

The spelling of 647437473 in words is "six hundred forty-seven million, four hundred thirty-seven thousand, four hundred seventy-three".