63339921 has 8 divisors (see below), whose sum is σ = 93836960. Its totient is φ = 42226596.

The previous prime is 63339889. The next prime is 63339931. The reversal of 63339921 is 12993336.

It is a happy number.

It is not a de Polignac number, because 63339921 - 2⁵ = 63339889 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (63339931) 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, 1172935 + ... + 1172988.

It is an arithmetic number, because the mean of its divisors is an integer number (11729620).

Almost surely, 2^63339921 is an apocalyptic number.

It is an amenable number.

63339921 is a deficient number, since it is larger than the sum of its proper divisors (30497039).

63339921 is a wasteful number, since it uses less digits than its factorization.

63339921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2345932 (or 2345926 counting only the distinct ones).

The product of its digits is 26244, while the sum is 36.

The square root of 63339921 is about 7958.6381372695. The cubic root of 63339921 is about 398.6200804459.

The spelling of 63339921 in words is "sixty-three million, three hundred thirty-nine thousand, nine hundred twenty-one".