678802863 has 4 divisors (see below), whose sum is σ = 905070488. Its totient is φ = 452535240.

The previous prime is 678802849. The next prime is 678802871. The reversal of 678802863 is 368208876.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 678802863 - 2⁹ = 678802351 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 (678802063) 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, 113133808 + ... + 113133813.

It is an arithmetic number, because the mean of its divisors is an integer number (226267622).

Almost surely, 2^678802863 is an apocalyptic number.

678802863 is a deficient number, since it is larger than the sum of its proper divisors (226267625).

678802863 is a wasteful number, since it uses less digits than its factorization.

678802863 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 226267624.

The product of its (nonzero) digits is 774144, while the sum is 48.

The square root of 678802863 is about 26053.8454551339. The cubic root of 678802863 is about 878.8495913571.

The spelling of 678802863 in words is "six hundred seventy-eight million, eight hundred two thousand, eight hundred sixty-three".