643227 has 8 divisors (see below), whose sum is σ = 923664. Its totient is φ = 395808.

The previous prime is 643217. The next prime is 643231. The reversal of 643227 is 722346.

643227 is digitally balanced in base 2 and base 7, because in such bases it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 643227 - 2⁷ = 643099 is a prime.

643227 is strictly pandigital in base 7.

It is a junction number, because it is equal to n+sod(n) for n = 643197 and 643206.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 643227.

It is not an unprimeable number, because it can be changed into a prime (643217) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8208 + ... + 8285.

It is an arithmetic number, because the mean of its divisors is an integer number (115458).

2⁶⁴³²²⁷ is an apocalyptic number.

643227 is a deficient number, since it is larger than the sum of its proper divisors (280437).

643227 is a wasteful number, since it uses less digits than its factorization.

643227 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16509.

The product of its digits is 2016, while the sum is 24.

The square root of 643227 is about 802.0143390239. The cubic root of 643227 is about 86.3219856915.

The spelling of 643227 in words is "six hundred forty-three thousand, two hundred twenty-seven".