674789 has 2 divisors, whose sum is σ = 674790. Its totient is φ = 674788.

The previous prime is 674771. The next prime is 674813. The reversal of 674789 is 987476.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 616225 + 58564 = 785^2 + 242^2 .

It is a cyclic number.

It is not a de Polignac number, because 674789 - 2⁸ = 674533 is a prime.

It is a Chen 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 (674719) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 337394 + 337395.

It is an arithmetic number, because the mean of its divisors is an integer number (337395).

2⁶⁷⁴⁷⁸⁹ is an apocalyptic number.

It is an amenable number.

674789 is a deficient number, since it is larger than the sum of its proper divisors (1).

674789 is an equidigital number, since it uses as much as digits as its factorization.

674789 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 84672, while the sum is 41.

The square root of 674789 is about 821.4554157104. The cubic root of 674789 is about 87.7113909310.

The spelling of 674789 in words is "six hundred seventy-four thousand, seven hundred eighty-nine".