63478821 has 8 divisors (see below), whose sum is σ = 96729664. Its totient is φ = 36273600.

The previous prime is 63478787. The next prime is 63478841. The reversal of 63478821 is 12887436.

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

It is not a de Polignac number, because 63478821 - 2¹⁰ = 63477797 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 63478821.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (63478841) 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, 1511380 + ... + 1511421.

It is an arithmetic number, because the mean of its divisors is an integer number (12091208).

Almost surely, 2^63478821 is an apocalyptic number.

It is an amenable number.

63478821 is a deficient number, since it is larger than the sum of its proper divisors (33250843).

63478821 is a wasteful number, since it uses less digits than its factorization.

63478821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3022811.

The product of its digits is 64512, while the sum is 39.

The square root of 63478821 is about 7967.3597257812. The cubic root of 63478821 is about 398.9112496621.

The spelling of 63478821 in words is "sixty-three million, four hundred seventy-eight thousand, eight hundred twenty-one".