63391 has 2 divisors, whose sum is σ = 63392. Its totient is φ = 63390.

The previous prime is 63389. The next prime is 63397. The reversal of 63391 is 19336.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 63391 - 2¹ = 63389 is a prime.

Together with 63389, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (63397) 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, 31695 + 31696.

It is an arithmetic number, because the mean of its divisors is an integer number (31696).

2⁶³³⁹¹ is an apocalyptic number.

63391 is a deficient number, since it is larger than the sum of its proper divisors (1).

63391 is an equidigital number, since it uses as much as digits as its factorization.

63391 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 486, while the sum is 22.

The square root of 63391 is about 251.7756938229. The cubic root of 63391 is about 39.8727204273.

It can be divided in two parts, 63 and 391, that added together give a palindrome (454).

The spelling of 63391 in words is "sixty-three thousand, three hundred ninety-one".