678541 has 2 divisors, whose sum is σ = 678542. Its totient is φ = 678540.

The previous prime is 678533. The next prime is 678553. The reversal of 678541 is 145876.

678541 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 594441 + 84100 = 771^2 + 290^2 .

It is a cyclic number.

It is not a de Polignac number, because 678541 - 2³ = 678533 is a prime.

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

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (678581) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 339270 + 339271.

It is an arithmetic number, because the mean of its divisors is an integer number (339271).

2⁶⁷⁸⁵⁴¹ is an apocalyptic number.

It is an amenable number.

678541 is a deficient number, since it is larger than the sum of its proper divisors (1).

678541 is an equidigital number, since it uses as much as digits as its factorization.

678541 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6720, while the sum is 31.

The square root of 678541 is about 823.7360013985. The cubic root of 678541 is about 87.8736565026.

The spelling of 678541 in words is "six hundred seventy-eight thousand, five hundred forty-one".