678969 has 8 divisors (see below), whose sum is σ = 1005920. Its totient is φ = 452628.

The previous prime is 678959. The next prime is 678971. The reversal of 678969 is 969876.

678969 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 678969 - 2¹³ = 670777 is a prime.

It is a super-2 number, since 2×678969² = 921997805922, which contains 22 as substring.

It is an alternating number because its digits alternate between even and odd.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (678949) 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, 12547 + ... + 12600.

It is an arithmetic number, because the mean of its divisors is an integer number (125740).

2⁶⁷⁸⁹⁶⁹ is an apocalyptic number.

It is an amenable number.

678969 is a deficient number, since it is larger than the sum of its proper divisors (326951).

678969 is a wasteful number, since it uses less digits than its factorization.

678969 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25156 (or 25150 counting only the distinct ones).

The product of its digits is 163296, while the sum is 45.

The square root of 678969 is about 823.9957524162. The cubic root of 678969 is about 87.8921284987.

The spelling of 678969 in words is "six hundred seventy-eight thousand, nine hundred sixty-nine".