1678069 has 2 divisors, whose sum is σ = 1678070. Its totient is φ = 1678068.

The previous prime is 1678067. The next prime is 1678073. The reversal of 1678069 is 9608761.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1077444 + 600625 = 1038^2 + 775^2 .

It is an emirp because it is prime and its reverse (9608761) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1678069 - 2¹ = 1678067 is a prime.

It is a super-2 number, since 2×1678069² = 5631831137522, which contains 22 as substring.

Together with 1678067, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1678067) 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, 839034 + 839035.

It is an arithmetic number, because the mean of its divisors is an integer number (839035).

2^1678069 is an apocalyptic number.

It is an amenable number.

1678069 is a deficient number, since it is larger than the sum of its proper divisors (1).

1678069 is an equidigital number, since it uses as much as digits as its factorization.

1678069 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 18144, while the sum is 37.

The square root of 1678069 is about 1295.4030260888. The cubic root of 1678069 is about 118.8328751124.

The spelling of 1678069 in words is "one million, six hundred seventy-eight thousand, sixty-nine".