647433 has 10 divisors (see below), whose sum is σ = 967274. Its totient is φ = 431568.

The previous prime is 647429. The next prime is 647441. The reversal of 647433 is 334746.

It can be written as a sum of positive squares in only one way, i.e., 419904 + 227529 = 648^2 + 477^2 .

It is not a de Polignac number, because 647433 - 2² = 647429 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Duffinian number.

647433 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 647397 and 647406.

It is not an unprimeable number, because it can be changed into a prime (647453) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 3916 + ... + 4077.

2⁶⁴⁷⁴³³ is an apocalyptic number.

It is an amenable number.

647433 is a deficient number, since it is larger than the sum of its proper divisors (319841).

647433 is an equidigital number, since it uses as much as digits as its factorization.

647433 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8005 (or 7996 counting only the distinct ones).

The product of its digits is 6048, while the sum is 27.

The square root of 647433 is about 804.6322141202. The cubic root of 647433 is about 86.5097274859.

It can be divided in two parts, 64743 and 3, that added together give a palindrome (64746).

The spelling of 647433 in words is "six hundred forty-seven thousand, four hundred thirty-three".