63827813 has 8 divisors (see below), whose sum is σ = 73870080. Its totient is φ = 54016560.

The previous prime is 63827773. The next prime is 63827839. The reversal of 63827813 is 31872836.

It is a happy number.

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 63827813 - 2²⁰ = 62779237 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 (63827713) 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, 57158 + ... + 58263.

It is an arithmetic number, because the mean of its divisors is an integer number (9233760).

Almost surely, 2^63827813 is an apocalyptic number.

It is an amenable number.

63827813 is a deficient number, since it is larger than the sum of its proper divisors (10042267).

63827813 is a wasteful number, since it uses less digits than its factorization.

63827813 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 115507.

The product of its digits is 48384, while the sum is 38.

The square root of 63827813 is about 7989.2310643766. The cubic root of 63827813 is about 399.6409548963.

The spelling of 63827813 in words is "sixty-three million, eight hundred twenty-seven thousand, eight hundred thirteen".