63969487 has 4 divisors (see below), whose sum is σ = 67732416. Its totient is φ = 60206560.

The previous prime is 63969481. The next prime is 63969533. The reversal of 63969487 is 78496936.

63969487 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 63969487 - 2⁷ = 63969359 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 (63969481) 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, 1881439 + ... + 1881472.

It is an arithmetic number, because the mean of its divisors is an integer number (16933104).

Almost surely, 2^63969487 is an apocalyptic number.

63969487 is a deficient number, since it is larger than the sum of its proper divisors (3762929).

63969487 is a wasteful number, since it uses less digits than its factorization.

63969487 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3762928.

The product of its digits is 1959552, while the sum is 52.

The square root of 63969487 is about 7998.0927101403. The cubic root of 63969487 is about 399.9364211449.

The spelling of 63969487 in words is "sixty-three million, nine hundred sixty-nine thousand, four hundred eighty-seven".