439631 has 2 divisors, whose sum is σ = 439632. Its totient is φ = 439630.

The previous prime is 439613. The next prime is 439639. The reversal of 439631 is 136934.

Together with previous prime (439613) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 439631 - 2⁶ = 439567 is a prime.

It is a super-2 number, since 2×439631² = 386550832322, which contains 22 as substring.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 439631.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (439639) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 219815 + 219816.

It is an arithmetic number, because the mean of its divisors is an integer number (219816).

2⁴³⁹⁶³¹ is an apocalyptic number.

439631 is a deficient number, since it is larger than the sum of its proper divisors (1).

439631 is an equidigital number, since it uses as much as digits as its factorization.

439631 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1944, while the sum is 26.

The square root of 439631 is about 663.0467555158. The cubic root of 439631 is about 76.0377813073.

The spelling of 439631 in words is "four hundred thirty-nine thousand, six hundred thirty-one".