63447385 has 4 divisors (see below), whose sum is σ = 76136868. Its totient is φ = 50757904.

The previous prime is 63447379. The next prime is 63447431. The reversal of 63447385 is 58374436.

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 30603024 + 32844361 = 5532^2 + 5731^2 .

It is a cyclic number.

It is not a de Polignac number, because 63447385 - 2⁷ = 63447257 is a prime.

It is a Duffinian number.

It is an unprimeable number.

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, 6344734 + ... + 6344743.

It is an arithmetic number, because the mean of its divisors is an integer number (19034217).

Almost surely, 2^63447385 is an apocalyptic number.

It is an amenable number.

63447385 is a deficient number, since it is larger than the sum of its proper divisors (12689483).

63447385 is a wasteful number, since it uses less digits than its factorization.

63447385 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12689482.

The product of its digits is 241920, while the sum is 40.

The square root of 63447385 is about 7965.3866823903. The cubic root of 63447385 is about 398.8453891412.

The spelling of 63447385 in words is "sixty-three million, four hundred forty-seven thousand, three hundred eighty-five".