678725263 has 4 divisors (see below), whose sum is σ = 683679600. Its totient is φ = 673770928.

The previous prime is 678725249. The next prime is 678725269. The reversal of 678725263 is 362527876.

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 678725263 - 2⁵ = 678725231 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 (678725269) 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, 2476963 + ... + 2477236.

It is an arithmetic number, because the mean of its divisors is an integer number (170919900).

Almost surely, 2^678725263 is an apocalyptic number.

678725263 is a deficient number, since it is larger than the sum of its proper divisors (4954337).

678725263 is a wasteful number, since it uses less digits than its factorization.

678725263 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4954336.

The product of its digits is 846720, while the sum is 46.

The square root of 678725263 is about 26052.3561890283. The cubic root of 678725263 is about 878.8161003732.

The spelling of 678725263 in words is "six hundred seventy-eight million, seven hundred twenty-five thousand, two hundred sixty-three".