63320591 has 4 divisors (see below), whose sum is σ = 63337272. Its totient is φ = 63303912.

The previous prime is 63320539. The next prime is 63320611. The reversal of 63320591 is 19502336.

63320591 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 63320591 - 2¹⁸ = 63058447 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 (63322591) 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 3 ways as a sum of consecutive naturals, for example, 425 + ... + 11261.

It is an arithmetic number, because the mean of its divisors is an integer number (15834318).

Almost surely, 2^63320591 is an apocalyptic number.

63320591 is a deficient number, since it is larger than the sum of its proper divisors (16681).

63320591 is a wasteful number, since it uses less digits than its factorization.

63320591 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16680.

The product of its (nonzero) digits is 4860, while the sum is 29.

The square root of 63320591 is about 7957.4236408526. The cubic root of 63320591 is about 398.5795261899.

The spelling of 63320591 in words is "sixty-three million, three hundred twenty thousand, five hundred ninety-one".