678593 has 2 divisors, whose sum is σ = 678594. Its totient is φ = 678592.

The previous prime is 678581. The next prime is 678599. The reversal of 678593 is 395876.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 543169 + 135424 = 737^2 + 368^2 .

It is a cyclic number.

It is not a de Polignac number, because 678593 - 2⁴ = 678577 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (678599) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 339296 + 339297.

It is an arithmetic number, because the mean of its divisors is an integer number (339297).

2⁶⁷⁸⁵⁹³ is an apocalyptic number.

It is an amenable number.

678593 is a deficient number, since it is larger than the sum of its proper divisors (1).

678593 is an equidigital number, since it uses as much as digits as its factorization.

678593 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 45360, while the sum is 38.

The square root of 678593 is about 823.7675643044. The cubic root of 678593 is about 87.8759011783.

The spelling of 678593 in words is "six hundred seventy-eight thousand, five hundred ninety-three".