63817 has 4 divisors (see below), whose sum is σ = 68740. Its totient is φ = 58896.

The previous prime is 63809. The next prime is 63823. The reversal of 63817 is 71836.

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

It can be written as a sum of positive squares in 2 ways, for example, as 41616 + 22201 = 204^2 + 149^2 .

It is a cyclic number.

It is not a de Polignac number, because 63817 - 2³ = 63809 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 63791 and 63800.

It is not an unprimeable number, because it can be changed into a prime (63857) 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, 2442 + ... + 2467.

It is an arithmetic number, because the mean of its divisors is an integer number (17185).

2⁶³⁸¹⁷ is an apocalyptic number.

It is an amenable number.

63817 is a deficient number, since it is larger than the sum of its proper divisors (4923).

63817 is a wasteful number, since it uses less digits than its factorization.

63817 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4922.

The product of its digits is 1008, while the sum is 25.

The square root of 63817 is about 252.6202683872. The cubic root of 63817 is about 39.9618386043.

The spelling of 63817 in words is "sixty-three thousand, eight hundred seventeen".