438439 has 2 divisors, whose sum is σ = 438440. Its totient is φ = 438438.

The previous prime is 438419. The next prime is 438443. The reversal of 438439 is 934834.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 438439 - 2¹⁷ = 307367 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 438439.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (438409) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 219219 + 219220.

It is an arithmetic number, because the mean of its divisors is an integer number (219220).

2⁴³⁸⁴³⁹ is an apocalyptic number.

438439 is a deficient number, since it is larger than the sum of its proper divisors (1).

438439 is an equidigital number, since it uses as much as digits as its factorization.

438439 is an evil number, because the sum of its binary digits is even.

The product of its digits is 10368, while the sum is 31.

The square root of 438439 is about 662.1472645870. The cubic root of 438439 is about 75.9689970499.

The spelling of 438439 in words is "four hundred thirty-eight thousand, four hundred thirty-nine".