678554 has 8 divisors (see below), whose sum is σ = 1024788. Its totient is φ = 336960.

The previous prime is 678553. The next prime is 678563. The reversal of 678554 is 455876.

678554 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 677329 + 1225 = 823^2 + 35^2 .

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

It is not an unprimeable number, because it can be changed into a prime (678553) 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, 767 + ... + 1394.

2⁶⁷⁸⁵⁵⁴ is an apocalyptic number.

678554 is a deficient number, since it is larger than the sum of its proper divisors (346234).

678554 is a wasteful number, since it uses less digits than its factorization.

678554 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2320.

The product of its digits is 33600, while the sum is 35.

The square root of 678554 is about 823.7438922384. The cubic root of 678554 is about 87.8742176823.

The spelling of 678554 in words is "six hundred seventy-eight thousand, five hundred fifty-four".