63561247 has 4 divisors (see below), whose sum is σ = 63765936. Its totient is φ = 63356560.

The previous prime is 63561221. The next prime is 63561263. The reversal of 63561247 is 74216536.

It is a happy number.

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 63561247 - 2¹⁹ = 63036959 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (63561217) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 101878 + ... + 102499.

It is an arithmetic number, because the mean of its divisors is an integer number (15941484).

Almost surely, 2^63561247 is an apocalyptic number.

63561247 is a deficient number, since it is larger than the sum of its proper divisors (204689).

63561247 is a wasteful number, since it uses less digits than its factorization.

63561247 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 204688.

The product of its digits is 30240, while the sum is 34.

The square root of 63561247 is about 7972.5307776138. The cubic root of 63561247 is about 399.0838344538.

The spelling of 63561247 in words is "sixty-three million, five hundred sixty-one thousand, two hundred forty-seven".