63813 has 8 divisors (see below), whose sum is σ = 86400. Its totient is φ = 41888.

The previous prime is 63809. The next prime is 63823. The reversal of 63813 is 31836.

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

It is a cyclic number.

It is not a de Polignac number, because 63813 - 2² = 63809 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 63813.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (63803) 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, 148 + ... + 386.

It is an arithmetic number, because the mean of its divisors is an integer number (10800).

2⁶³⁸¹³ is an apocalyptic number.

It is an amenable number.

63813 is a deficient number, since it is larger than the sum of its proper divisors (22587).

63813 is a wasteful number, since it uses less digits than its factorization.

63813 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 331.

The product of its digits is 432, while the sum is 21.

The square root of 63813 is about 252.6123512420. The cubic root of 63813 is about 39.9610036612.

The spelling of 63813 in words is "sixty-three thousand, eight hundred thirteen".