423647 has 4 divisors (see below), whose sum is σ = 484176. Its totient is φ = 363120.

The previous prime is 423617. The next prime is 423649. The reversal of 423647 is 746324.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 423647 - 2¹⁴ = 407263 is a prime.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 423647.

It is not an unprimeable number, because it can be changed into a prime (423649) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 30254 + ... + 30267.

It is an arithmetic number, because the mean of its divisors is an integer number (121044).

2⁴²³⁶⁴⁷ is an apocalyptic number.

423647 is a deficient number, since it is larger than the sum of its proper divisors (60529).

423647 is an equidigital number, since it uses as much as digits as its factorization.

423647 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60528.

The product of its digits is 4032, while the sum is 26.

The square root of 423647 is about 650.8817096831. The cubic root of 423647 is about 75.1048607288.

The spelling of 423647 in words is "four hundred twenty-three thousand, six hundred forty-seven".