647273 has 12 divisors (see below), whose sum is σ = 749808. Its totient is φ = 554040.

The previous prime is 647263. The next prime is 647293. The reversal of 647273 is 372746.

It is not a de Polignac number, because 647273 - 2⁶ = 647209 is a prime.

It is a Duffinian number.

It is a nialpdrome in base 15.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 647273.

It is not an unprimeable number, because it can be changed into a prime (647263) 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, 3890 + ... + 4052.

It is an arithmetic number, because the mean of its divisors is an integer number (62484).

2⁶⁴⁷²⁷³ is an apocalyptic number.

It is an amenable number.

647273 is a deficient number, since it is larger than the sum of its proper divisors (102535).

647273 is a wasteful number, since it uses less digits than its factorization.

647273 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 212 (or 193 counting only the distinct ones).

The product of its digits is 7056, while the sum is 29.

The square root of 647273 is about 804.5327836701. The cubic root of 647273 is about 86.5026005210.

It can be divided in two parts, 64 and 7273, that added together give a palindrome (7337).

The spelling of 647273 in words is "six hundred forty-seven thousand, two hundred seventy-three".