1698089 has 2 divisors, whose sum is σ = 1698090. Its totient is φ = 1698088.

The previous prime is 1698077. The next prime is 1698101. The reversal of 1698089 is 9808961.

It is a balanced prime because it is at equal distance from previous prime (1698077) and next prime (1698101).

It can be written as a sum of positive squares in only one way, i.e., 984064 + 714025 = 992^2 + 845^2 .

It is an emirp because it is prime and its reverse (9808961) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1698089 - 2⁸ = 1697833 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (1698029) 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, 849044 + 849045.

It is an arithmetic number, because the mean of its divisors is an integer number (849045).

2^1698089 is an apocalyptic number.

It is an amenable number.

1698089 is a deficient number, since it is larger than the sum of its proper divisors (1).

1698089 is an equidigital number, since it uses as much as digits as its factorization.

1698089 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 31104, while the sum is 41.

The square root of 1698089 is about 1303.1074399296. The cubic root of 1698089 is about 119.3035819080.

The spelling of 1698089 in words is "one million, six hundred ninety-eight thousand, eighty-nine".