63959 has 4 divisors (see below), whose sum is σ = 73104. Its totient is φ = 54816.

The previous prime is 63949. The next prime is 63977. The reversal of 63959 is 95936.

Added to its reverse (95936) it gives a triangular number (159895 = T₅₆₅).

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

It is a cyclic number.

It is not a de Polignac number, because 63959 - 2⁸ = 63703 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (63929) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4562 + ... + 4575.

It is an arithmetic number, because the mean of its divisors is an integer number (18276).

2⁶³⁹⁵⁹ is an apocalyptic number.

63959 is a deficient number, since it is larger than the sum of its proper divisors (9145).

63959 is an equidigital number, since it uses as much as digits as its factorization.

63959 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9144.

The product of its digits is 7290, while the sum is 32.

The square root of 63959 is about 252.9011664663. The cubic root of 63959 is about 39.9914565087.

Adding to 63959 its reverse (95936), we get a triangular number (159895 = T₅₆₅).

The spelling of 63959 in words is "sixty-three thousand, nine hundred fifty-nine".