678069 has 24 divisors (see below), whose sum is σ = 1148160. Its totient is φ = 377568.

The previous prime is 678061. The next prime is 678077. The reversal of 678069 is 960876.

678069 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (678061) and next prime (678077).

It is not a de Polignac number, because 678069 - 2³ = 678061 is a prime.

It is a super-2 number, since 2×678069² = 919555137522, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (678061) 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, 2847 + ... + 3075.

It is an arithmetic number, because the mean of its divisors is an integer number (47840).

2⁶⁷⁸⁰⁶⁹ is an apocalyptic number.

It is an amenable number.

678069 is a deficient number, since it is larger than the sum of its proper divisors (470091).

678069 is a wasteful number, since it uses less digits than its factorization.

678069 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 289 (or 286 counting only the distinct ones).

The product of its (nonzero) digits is 18144, while the sum is 36.

The square root of 678069 is about 823.4494520005. The cubic root of 678069 is about 87.8532765076.

The spelling of 678069 in words is "six hundred seventy-eight thousand, sixty-nine".