63543947 has 4 divisors (see below), whose sum is σ = 63566160. Its totient is φ = 63521736.

The previous prime is 63543941. The next prime is 63543967. The reversal of 63543947 is 74934536.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 63543947 - 2⁸ = 63543691 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (63543941) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6047 + ... + 12792.

It is an arithmetic number, because the mean of its divisors is an integer number (15891540).

Almost surely, 2^63543947 is an apocalyptic number.

63543947 is a deficient number, since it is larger than the sum of its proper divisors (22213).

63543947 is a wasteful number, since it uses less digits than its factorization.

63543947 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22212.

The product of its digits is 272160, while the sum is 41.

The square root of 63543947 is about 7971.4457283482. The cubic root of 63543947 is about 399.0476238321.

It can be divided in two parts, 6354 and 3947, that added together give a palindrome (10301).

The spelling of 63543947 in words is "sixty-three million, five hundred forty-three thousand, nine hundred forty-seven".