423569 has 4 divisors (see below), whose sum is σ = 424944. Its totient is φ = 422196.

The previous prime is 423559. The next prime is 423581. The reversal of 423569 is 965324.

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, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 423569 - 2¹² = 419473 is a prime.

It is a super-2 number, since 2×423569² = 358821395522, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (423509) 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, 14 + ... + 920.

It is an arithmetic number, because the mean of its divisors is an integer number (106236).

2⁴²³⁵⁶⁹ is an apocalyptic number.

It is an amenable number.

423569 is a deficient number, since it is larger than the sum of its proper divisors (1375).

423569 is an equidigital number, since it uses as much as digits as its factorization.

423569 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1374.

The product of its digits is 6480, while the sum is 29.

The square root of 423569 is about 650.8217882032. The cubic root of 423569 is about 75.1002511216.

The spelling of 423569 in words is "four hundred twenty-three thousand, five hundred sixty-nine".