63539071 has 4 divisors (see below), whose sum is σ = 63577672. Its totient is φ = 63500472.

The previous prime is 63539033. The next prime is 63539089. The reversal of 63539071 is 17093536.

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 63539071 - 2¹⁷ = 63407999 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 (63539011) 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, 16716 + ... + 20161.

It is an arithmetic number, because the mean of its divisors is an integer number (15894418).

Almost surely, 2^63539071 is an apocalyptic number.

63539071 is a deficient number, since it is larger than the sum of its proper divisors (38601).

63539071 is a wasteful number, since it uses less digits than its factorization.

63539071 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38600.

The product of its (nonzero) digits is 17010, while the sum is 34.

The square root of 63539071 is about 7971.1398808451. The cubic root of 63539071 is about 399.0374166916.

The spelling of 63539071 in words is "sixty-three million, five hundred thirty-nine thousand, seventy-one".