678955 has 8 divisors (see below), whose sum is σ = 819504. Its totient is φ = 540000.

The previous prime is 678949. The next prime is 678959. The reversal of 678955 is 559876.

It is a happy number.

678955 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 678955 - 2¹³ = 670763 is a prime.

It is a Duffinian number.

678955 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (678959) 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, 985 + ... + 1525.

It is an arithmetic number, because the mean of its divisors is an integer number (102438).

2⁶⁷⁸⁹⁵⁵ is an apocalyptic number.

678955 is a deficient number, since it is larger than the sum of its proper divisors (140549).

678955 is a wasteful number, since it uses less digits than its factorization.

678955 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 797.

The product of its digits is 75600, while the sum is 40.

The square root of 678955 is about 823.9872571830. The cubic root of 678955 is about 87.8915243974.

It can be divided in two parts, 6 and 78955, that added together give a square (78961 = 281²).

The spelling of 678955 in words is "six hundred seventy-eight thousand, nine hundred fifty-five".