63345821 has 8 divisors (see below), whose sum is σ = 78976704. Its totient is φ = 49360320.

The previous prime is 63345817. The next prime is 63345827. The reversal of 63345821 is 12854336.

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 63345821 - 2² = 63345817 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 (63345827) 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, 411260 + ... + 411413.

It is an arithmetic number, because the mean of its divisors is an integer number (9872088).

Almost surely, 2^63345821 is an apocalyptic number.

It is an amenable number.

63345821 is a deficient number, since it is larger than the sum of its proper divisors (15630883).

63345821 is a wasteful number, since it uses less digits than its factorization.

63345821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 822691.

The product of its digits is 17280, while the sum is 32.

The square root of 63345821 is about 7959.0087950699. The cubic root of 63345821 is about 398.6324569767.

The spelling of 63345821 in words is "sixty-three million, three hundred forty-five thousand, eight hundred twenty-one".