63439 has 2 divisors, whose sum is σ = 63440. Its totient is φ = 63438.

The previous prime is 63421. The next prime is 63443. The reversal of 63439 is 93436.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 63439 - 2⁷ = 63311 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (63409) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 31719 + 31720.

It is an arithmetic number, because the mean of its divisors is an integer number (31720).

2⁶³⁴³⁹ is an apocalyptic number.

63439 is a deficient number, since it is larger than the sum of its proper divisors (1).

63439 is an equidigital number, since it uses as much as digits as its factorization.

63439 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1944, while the sum is 25.

The square root of 63439 is about 251.8709987275. The cubic root of 63439 is about 39.8827818331.

The spelling of 63439 in words is "sixty-three thousand, four hundred thirty-nine".