63789 has 8 divisors (see below), whose sum is σ = 92832. Its totient is φ = 38640.

The previous prime is 63781. The next prime is 63793. The reversal of 63789 is 98736.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 63789 - 2³ = 63781 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33), and also a Moran number because the ratio is a prime number: 1933 = 63789 / (6 + 3 + 7 + 8 + 9).

It is a Curzon number.

63789 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (63781) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 934 + ... + 999.

It is an arithmetic number, because the mean of its divisors is an integer number (11604).

2⁶³⁷⁸⁹ is an apocalyptic number.

It is an amenable number.

63789 is a deficient number, since it is larger than the sum of its proper divisors (29043).

63789 is a wasteful number, since it uses less digits than its factorization.

63789 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1947.

The product of its digits is 9072, while the sum is 33.

The square root of 63789 is about 252.5648431591. The cubic root of 63789 is about 39.9559932696.

The spelling of 63789 in words is "sixty-three thousand, seven hundred eighty-nine".