647271793 has 32 divisors (see below), whose sum is σ = 784949760. Its totient is φ = 522063360.

The previous prime is 647271767. The next prime is 647271799. The reversal of 647271793 is 397172746.

It is not a de Polignac number, because 647271793 - 2⁵ = 647271761 is a prime.

It is a Smith number, since the sum of its digits (46) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (647271799) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2067805 + ... + 2068117.

It is an arithmetic number, because the mean of its divisors is an integer number (24529680).

Almost surely, 2^647271793 is an apocalyptic number.

It is an amenable number.

647271793 is a deficient number, since it is larger than the sum of its proper divisors (137677967).

647271793 is a wasteful number, since it uses less digits than its factorization.

647271793 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 577.

The product of its digits is 444528, while the sum is 46.

The square root of 647271793 is about 25441.5367656909. The cubic root of 647271793 is about 865.0254675251.

The spelling of 647271793 in words is "six hundred forty-seven million, two hundred seventy-one thousand, seven hundred ninety-three".