63678689 has 8 divisors (see below), whose sum is σ = 64462848. Its totient is φ = 62899200.

The previous prime is 63678683. The next prime is 63678691. The reversal of 63678689 is 98687636.

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 63678689 - 2⁴ = 63678673 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 63678689.

It is not an unprimeable number, because it can be changed into a prime (63678683) 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, 31664 + ... + 33614.

It is an arithmetic number, because the mean of its divisors is an integer number (8057856).

Almost surely, 2^63678689 is an apocalyptic number.

It is an amenable number.

63678689 is a deficient number, since it is larger than the sum of its proper divisors (784159).

63678689 is a wasteful number, since it uses less digits than its factorization.

63678689 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2335.

The product of its digits is 2612736, while the sum is 53.

The square root of 63678689 is about 7979.8927937661. The cubic root of 63678689 is about 399.3294787144.

The spelling of 63678689 in words is "sixty-three million, six hundred seventy-eight thousand, six hundred eighty-nine".