438523 has 2 divisors, whose sum is σ = 438524. Its totient is φ = 438522.

The previous prime is 438521. The next prime is 438527. The reversal of 438523 is 325834.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 438523 - 2¹ = 438521 is a prime.

Together with 438521, it forms a pair of twin primes.

It is an alternating number because its digits alternate between even and odd.

It is not a weakly prime, because it can be changed into another prime (438521) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 219261 + 219262.

It is an arithmetic number, because the mean of its divisors is an integer number (219262).

2⁴³⁸⁵²³ is an apocalyptic number.

438523 is a deficient number, since it is larger than the sum of its proper divisors (1).

438523 is an equidigital number, since it uses as much as digits as its factorization.

438523 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2880, while the sum is 25.

The square root of 438523 is about 662.2106915476. The cubic root of 438523 is about 75.9738483429.

It can be divided in two parts, 438 and 523, that added together give a square (961 = 31²).

The spelling of 438523 in words is "four hundred thirty-eight thousand, five hundred twenty-three".