423613 has 6 divisors (see below), whose sum is σ = 439166. Its totient is φ = 408312.

The previous prime is 423601. The next prime is 423617. The reversal of 423613 is 316324.

It can be written as a sum of positive squares in only one way, i.e., 412164 + 11449 = 642^2 + 107^2 .

It is not a de Polignac number, because 423613 - 2⁵ = 423581 is a prime.

It is a Duffinian number.

Its product of digits (432) is a multiple of the sum of its prime divisors (144).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (423617) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3906 + ... + 4012.

2⁴²³⁶¹³ is an apocalyptic number.

It is an amenable number.

423613 is a deficient number, since it is larger than the sum of its proper divisors (15553).

423613 is an equidigital number, since it uses as much as digits as its factorization.

423613 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 251 (or 144 counting only the distinct ones).

The product of its digits is 432, while the sum is 19.

The square root of 423613 is about 650.8555907419. The cubic root of 423613 is about 75.1028514824.

Adding to 423613 its reverse (316324), we get a palindrome (739937).

It can be divided in two parts, 42 and 3613, that added together give a triangular number (3655 = T₈₅).

The spelling of 423613 in words is "four hundred twenty-three thousand, six hundred thirteen".