423689 has 4 divisors (see below), whose sum is σ = 484224. Its totient is φ = 363156.

The previous prime is 423667. The next prime is 423697. The reversal of 423689 is 986324.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 423689 - 2¹⁶ = 358153 is a prime.

It is a Duffinian number.

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, 30257 + ... + 30270.

It is an arithmetic number, because the mean of its divisors is an integer number (121056).

2⁴²³⁶⁸⁹ is an apocalyptic number.

It is an amenable number.

423689 is a deficient number, since it is larger than the sum of its proper divisors (60535).

423689 is an equidigital number, since it uses as much as digits as its factorization.

423689 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60534.

The product of its digits is 10368, while the sum is 32.

The square root of 423689 is about 650.9139728105. The cubic root of 423689 is about 75.1073425906.

The spelling of 423689 in words is "four hundred twenty-three thousand, six hundred eighty-nine".