1697389 has 2 divisors, whose sum is σ = 1697390. Its totient is φ = 1697388.

The previous prime is 1697383. The next prime is 1697401. The reversal of 1697389 is 9837961.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1464100 + 233289 = 1210^2 + 483^2 .

It is a cyclic number.

It is not a de Polignac number, because 1697389 - 2⁵ = 1697357 is a prime.

It is a super-2 number, since 2×1697389² = 5762258834642, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1697383) 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, 848694 + 848695.

It is an arithmetic number, because the mean of its divisors is an integer number (848695).

2^1697389 is an apocalyptic number.

It is an amenable number.

1697389 is a deficient number, since it is larger than the sum of its proper divisors (1).

1697389 is an equidigital number, since it uses as much as digits as its factorization.

1697389 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 81648, while the sum is 43.

The square root of 1697389 is about 1302.8388234928. The cubic root of 1697389 is about 119.2871862253.

The spelling of 1697389 in words is "one million, six hundred ninety-seven thousand, three hundred eighty-nine".