678901 has 2 divisors, whose sum is σ = 678902. Its totient is φ = 678900.

The previous prime is 678883. The next prime is 678907. The reversal of 678901 is 109876.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 656100 + 22801 = 810^2 + 151^2 .

It is a cyclic number.

It is not a de Polignac number, because 678901 - 2⁷ = 678773 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 (678907) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 339450 + 339451.

It is an arithmetic number, because the mean of its divisors is an integer number (339451).

2⁶⁷⁸⁹⁰¹ is an apocalyptic number.

It is an amenable number.

678901 is a deficient number, since it is larger than the sum of its proper divisors (1).

678901 is an equidigital number, since it uses as much as digits as its factorization.

678901 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3024, while the sum is 31.

The square root of 678901 is about 823.9544890344. The cubic root of 678901 is about 87.8891942144.

The spelling of 678901 in words is "six hundred seventy-eight thousand, nine hundred one".