423917 has 4 divisors (see below), whose sum is σ = 456540. Its totient is φ = 391296.

The previous prime is 423887. The next prime is 423931. The reversal of 423917 is 719324.

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

It can be written as a sum of positive squares in 2 ways, for example, as 164836 + 259081 = 406^2 + 509^2 .

It is a cyclic number.

It is not a de Polignac number, because 423917 - 2⁶ = 423853 is a prime.

It is a Duffinian number.

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 423917.

It is not an unprimeable number, because it can be changed into a prime (423977) 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, 16292 + ... + 16317.

It is an arithmetic number, because the mean of its divisors is an integer number (114135).

2⁴²³⁹¹⁷ is an apocalyptic number.

It is an amenable number.

423917 is a deficient number, since it is larger than the sum of its proper divisors (32623).

423917 is a wasteful number, since it uses less digits than its factorization.

423917 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32622.

The product of its digits is 1512, while the sum is 26.

The square root of 423917 is about 651.0890876063. The cubic root of 423917 is about 75.1208126935.

The spelling of 423917 in words is "four hundred twenty-three thousand, nine hundred seventeen".