63811 has 4 divisors (see below), whose sum is σ = 69624. Its totient is φ = 58000.

The previous prime is 63809. The next prime is 63823. The reversal of 63811 is 11836.

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 63811 - 2¹ = 63809 is a prime.

It is a Duffinian number.

It is a nialpdrome in base 16.

It is not an unprimeable number, because it can be changed into a prime (63841) 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, 2890 + ... + 2911.

It is an arithmetic number, because the mean of its divisors is an integer number (17406).

2⁶³⁸¹¹ is an apocalyptic number.

63811 is a deficient number, since it is larger than the sum of its proper divisors (5813).

63811 is a wasteful number, since it uses less digits than its factorization.

63811 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5812.

The product of its digits is 144, while the sum is 19.

The square root of 63811 is about 252.6083925763. The cubic root of 63811 is about 39.9605861765.

The spelling of 63811 in words is "sixty-three thousand, eight hundred eleven".