63445889 has 4 divisors (see below), whose sum is σ = 68326356. Its totient is φ = 58565424.

The previous prime is 63445849. The next prime is 63445897. The reversal of 63445889 is 98854436.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 41280625 + 22165264 = 6425^2 + 4708^2 .

It is a cyclic number.

It is not a de Polignac number, because 63445889 - 2¹⁶ = 63380353 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (63445849) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2440214 + ... + 2440239.

It is an arithmetic number, because the mean of its divisors is an integer number (17081589).

Almost surely, 2^63445889 is an apocalyptic number.

It is an amenable number.

63445889 is a deficient number, since it is larger than the sum of its proper divisors (4880467).

63445889 is a wasteful number, since it uses less digits than its factorization.

63445889 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4880466.

The product of its digits is 829440, while the sum is 47.

The square root of 63445889 is about 7965.2927755356. The cubic root of 63445889 is about 398.8422543790.

The spelling of 63445889 in words is "sixty-three million, four hundred forty-five thousand, eight hundred eighty-nine".