63899845 has 4 divisors (see below), whose sum is σ = 76679820. Its totient is φ = 51119872.

The previous prime is 63899839. The next prime is 63899867. The reversal of 63899845 is 54899836.

It is a happy number.

63899845 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 can be written as a sum of positive squares in 2 ways, for example, as 17032129 + 46867716 = 4127^2 + 6846^2 .

It is a cyclic number.

It is not a de Polignac number, because 63899845 - 2¹¹ = 63897797 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 63899792 and 63899801.

It is a congruent number.

It is an unprimeable number.

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, 6389980 + ... + 6389989.

It is an arithmetic number, because the mean of its divisors is an integer number (19169955).

Almost surely, 2^63899845 is an apocalyptic number.

It is an amenable number.

63899845 is a deficient number, since it is larger than the sum of its proper divisors (12779975).

63899845 is a wasteful number, since it uses less digits than its factorization.

63899845 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12779974.

The product of its digits is 1866240, while the sum is 52.

The square root of 63899845 is about 7993.7378616014. The cubic root of 63899845 is about 399.7912348117.

Subtracting from 63899845 its reverse (54899836), we obtain a palindrome (9000009).

The spelling of 63899845 in words is "sixty-three million, eight hundred ninety-nine thousand, eight hundred forty-five".