63447979 has 16 divisors (see below), whose sum is σ = 76455936. Its totient is φ = 51501600.

The previous prime is 63447971. The next prime is 63447983. The reversal of 63447979 is 97974436.

63447979 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 63447979 - 2³ = 63447971 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (63447971) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7089 + ... + 13309.

It is an arithmetic number, because the mean of its divisors is an integer number (4778496).

Almost surely, 2^63447979 is an apocalyptic number.

63447979 is a deficient number, since it is larger than the sum of its proper divisors (13007957).

63447979 is a wasteful number, since it uses less digits than its factorization.

63447979 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6306.

The product of its digits is 1143072, while the sum is 49.

The square root of 63447979 is about 7965.4239686284. The cubic root of 63447979 is about 398.8466338125.

The spelling of 63447979 in words is "sixty-three million, four hundred forty-seven thousand, nine hundred seventy-nine".