439613 has 2 divisors, whose sum is σ = 439614. Its totient is φ = 439612.

The previous prime is 439601. The next prime is 439631. The reversal of 439613 is 316934.

Together with next prime (439631) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 438244 + 1369 = 662^2 + 37^2 .

It is a cyclic number.

It is not a de Polignac number, because 439613 - 2⁸ = 439357 is a prime.

It is a Sophie Germain prime.

It is an Ulam number.

It is a Curzon number.

It is equal to p₃₆₉₀₈ and since 439613 and 36908 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (439693) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 219806 + 219807.

It is an arithmetic number, because the mean of its divisors is an integer number (219807).

2⁴³⁹⁶¹³ is an apocalyptic number.

It is an amenable number.

439613 is a deficient number, since it is larger than the sum of its proper divisors (1).

439613 is an equidigital number, since it uses as much as digits as its factorization.

439613 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 439613 is about 663.0331816734. The cubic root of 439613 is about 76.0367435440.

The spelling of 439613 in words is "four hundred thirty-nine thousand, six hundred thirteen".