63543491 has 8 divisors (see below), whose sum is σ = 69380400. Its totient is φ = 57716640.

The previous prime is 63543463. The next prime is 63543497. The reversal of 63543491 is 19434536.

63543491 = 1689² + 1690² + ... + 1710².

It is a happy number.

63543491 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 63543491 - 2⁶ = 63543427 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (63543497) 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 7 ways as a sum of consecutive naturals, for example, 18065 + ... + 21293.

It is an arithmetic number, because the mean of its divisors is an integer number (8672550).

Almost surely, 2^63543491 is an apocalyptic number.

63543491 is a deficient number, since it is larger than the sum of its proper divisors (5836909).

63543491 is a wasteful number, since it uses less digits than its factorization.

63543491 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5029.

The product of its digits is 38880, while the sum is 35.

The square root of 63543491 is about 7971.4171262079. The cubic root of 63543491 is about 399.0466692898.

The spelling of 63543491 in words is "sixty-three million, five hundred forty-three thousand, four hundred ninety-one".