678913563 has 16 divisors (see below), whose sum is σ = 945434880. Its totient is φ = 432536544.

The previous prime is 678913561. The next prime is 678913579. The reversal of 678913563 is 365319876.

It is a happy number.

It is not a de Polignac number, because 678913563 - 2¹ = 678913561 is a prime.

It is not an unprimeable number, because it can be changed into a prime (678913561) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 84693 + ... + 92361.

It is an arithmetic number, because the mean of its divisors is an integer number (59089680).

Almost surely, 2^678913563 is an apocalyptic number.

678913563 is a deficient number, since it is larger than the sum of its proper divisors (266521317).

678913563 is a wasteful number, since it uses less digits than its factorization.

678913563 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8978.

The product of its digits is 816480, while the sum is 48.

The square root of 678913563 is about 26055.9698149963. The cubic root of 678913563 is about 878.8973633819.

The spelling of 678913563 in words is "six hundred seventy-eight million, nine hundred thirteen thousand, five hundred sixty-three".