63868549 has 8 divisors (see below), whose sum is σ = 66235520. Its totient is φ = 61535376.

The previous prime is 63868523. The next prime is 63868559. The reversal of 63868549 is 94586836.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 63868549 - 2⁵ = 63868517 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 (63868559) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4569 + ... + 12190.

It is an arithmetic number, because the mean of its divisors is an integer number (8279440).

Almost surely, 2^63868549 is an apocalyptic number.

It is an amenable number.

63868549 is a deficient number, since it is larger than the sum of its proper divisors (2366971).

63868549 is a wasteful number, since it uses less digits than its factorization.

63868549 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16899.

The product of its digits is 1244160, while the sum is 49.

The square root of 63868549 is about 7991.7800895670. The cubic root of 63868549 is about 399.7259560427.

The spelling of 63868549 in words is "sixty-three million, eight hundred sixty-eight thousand, five hundred forty-nine".