63978827 has 4 divisors (see below), whose sum is σ = 69795096. Its totient is φ = 58162560.

The previous prime is 63978821. The next prime is 63978829. The reversal of 63978827 is 72887936.

It is a happy number.

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 63978827 - 2¹⁴ = 63962443 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (63978821) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2908118 + ... + 2908139.

It is an arithmetic number, because the mean of its divisors is an integer number (17448774).

Almost surely, 2^63978827 is an apocalyptic number.

63978827 is a deficient number, since it is larger than the sum of its proper divisors (5816269).

63978827 is a wasteful number, since it uses less digits than its factorization.

63978827 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5816268.

The product of its digits is 1016064, while the sum is 50.

The square root of 63978827 is about 7998.6765780346. The cubic root of 63978827 is about 399.9558847181.

The spelling of 63978827 in words is "sixty-three million, nine hundred seventy-eight thousand, eight hundred twenty-seven".