439897 has 4 divisors (see below), whose sum is σ = 441396. Its totient is φ = 438400.

The previous prime is 439891. The next prime is 439903. The reversal of 439897 is 798934.

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

It is an interprime number because it is at equal distance from previous prime (439891) and next prime (439903).

It can be written as a sum of positive squares in 2 ways, for example, as 318096 + 121801 = 564^2 + 349^2 .

It is a cyclic number.

It is not a de Polignac number, because 439897 - 2¹¹ = 437849 is a prime.

It is an Ulam number.

It is a Duffinian number.

439897 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (439891) 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, 148 + ... + 949.

It is an arithmetic number, because the mean of its divisors is an integer number (110349).

2⁴³⁹⁸⁹⁷ is an apocalyptic number.

It is an amenable number.

439897 is a deficient number, since it is larger than the sum of its proper divisors (1499).

439897 is a wasteful number, since it uses less digits than its factorization.

439897 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1498.

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

The square root of 439897 is about 663.2473143557. The cubic root of 439897 is about 76.0531138414.

The spelling of 439897 in words is "four hundred thirty-nine thousand, eight hundred ninety-seven".