63840489 has 4 divisors (see below), whose sum is σ = 85120656. Its totient is φ = 42560324.

The previous prime is 63840473. The next prime is 63840499. The reversal of 63840489 is 98404836.

63840489 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, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 63840489 - 2⁴ = 63840473 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 63840489.

It is not an unprimeable number, because it can be changed into a prime (63840409) 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, 10640079 + ... + 10640084.

It is an arithmetic number, because the mean of its divisors is an integer number (21280164).

Almost surely, 2^63840489 is an apocalyptic number.

It is an amenable number.

63840489 is a deficient number, since it is larger than the sum of its proper divisors (21280167).

63840489 is a wasteful number, since it uses less digits than its factorization.

63840489 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21280166.

The product of its (nonzero) digits is 165888, while the sum is 42.

The square root of 63840489 is about 7990.0243428916. The cubic root of 63840489 is about 399.6674089513.

The spelling of 63840489 in words is "sixty-three million, eight hundred forty thousand, four hundred eighty-nine".