438997 has 4 divisors (see below), whose sum is σ = 472780. Its totient is φ = 405216.

The previous prime is 438989. The next prime is 439007. The reversal of 438997 is 799834.

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 217156 + 221841 = 466^2 + 471^2 .

It is a cyclic number.

It is not a de Polignac number, because 438997 - 2³ = 438989 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (438937) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16872 + ... + 16897.

It is an arithmetic number, because the mean of its divisors is an integer number (118195).

2⁴³⁸⁹⁹⁷ is an apocalyptic number.

It is an amenable number.

438997 is a deficient number, since it is larger than the sum of its proper divisors (33783).

438997 is a wasteful number, since it uses less digits than its factorization.

438997 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33782.

The product of its digits is 54432, while the sum is 40.

The square root of 438997 is about 662.5684870261. The cubic root of 438997 is about 76.0012118920.

The spelling of 438997 in words is "four hundred thirty-eight thousand, nine hundred ninety-seven".