63589891 has 4 divisors (see below), whose sum is σ = 63606312. Its totient is φ = 63573472.

The previous prime is 63589861. The next prime is 63589909. The reversal of 63589891 is 19898536.

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 63589891 - 2¹³ = 63581699 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (63589861) 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, 1176 + ... + 11338.

It is an arithmetic number, because the mean of its divisors is an integer number (15901578).

Almost surely, 2^63589891 is an apocalyptic number.

63589891 is a deficient number, since it is larger than the sum of its proper divisors (16421).

63589891 is a wasteful number, since it uses less digits than its factorization.

63589891 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16420.

The product of its digits is 466560, while the sum is 49.

The square root of 63589891 is about 7974.3269935462. The cubic root of 63589891 is about 399.1437747536.

The spelling of 63589891 in words is "sixty-three million, five hundred eighty-nine thousand, eight hundred ninety-one".