678617973 has 24 divisors (see below), whose sum is σ = 1105070400. Its totient is φ = 411281640.

The previous prime is 678617963. The next prime is 678618047. The reversal of 678617973 is 379716876.

It is not a de Polignac number, because 678617973 - 2⁶ = 678617909 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (678617903) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 100593 + ... + 107126.

It is an arithmetic number, because the mean of its divisors is an integer number (46044600).

Almost surely, 2^678617973 is an apocalyptic number.

It is an amenable number.

678617973 is a deficient number, since it is larger than the sum of its proper divisors (426452427).

678617973 is a wasteful number, since it uses less digits than its factorization.

678617973 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 207750 (or 207733 counting only the distinct ones).

The product of its digits is 2667168, while the sum is 54.

The square root of 678617973 is about 26050.2969848714. The cubic root of 678617973 is about 878.7697914304.

The spelling of 678617973 in words is "six hundred seventy-eight million, six hundred seventeen thousand, nine hundred seventy-three".