63456985 has 4 divisors (see below), whose sum is σ = 76148388. Its totient is φ = 50765584.

The previous prime is 63456917. The next prime is 63456989. The reversal of 63456985 is 58965436.

63456985 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 46457856 + 16999129 = 6816^2 + 4123^2 .

It is a cyclic number.

It is not a de Polignac number, because 63456985 - 2¹⁵ = 63424217 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (63456989) 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, 6345694 + ... + 6345703.

It is an arithmetic number, because the mean of its divisors is an integer number (19037097).

Almost surely, 2^63456985 is an apocalyptic number.

It is an amenable number.

63456985 is a deficient number, since it is larger than the sum of its proper divisors (12691403).

63456985 is a wasteful number, since it uses less digits than its factorization.

63456985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12691402.

The product of its digits is 777600, while the sum is 46.

The square root of 63456985 is about 7965.9892668770. The cubic root of 63456985 is about 398.8655040896.

It can be divided in two parts, 6345698 and 5, that added together give a triangular number (6345703 = T₃₅₆₂).

The spelling of 63456985 in words is "sixty-three million, four hundred fifty-six thousand, nine hundred eighty-five".