1689356 has 6 divisors (see below), whose sum is σ = 2956380. Its totient is φ = 844676.

The previous prime is 1689353. The next prime is 1689367. The reversal of 1689356 is 6539861.

It is a d-powerful number, because it can be written as 1 + 6² + 8 + 9 + 3⁸ + 5⁵ + 6⁸ .

It is a zygodrome in base 2.

It is not an unprimeable number, because it can be changed into a prime (1689353) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 211166 + ... + 211173.

It is an arithmetic number, because the mean of its divisors is an integer number (492730).

2^1689356 is an apocalyptic number.

It is an amenable number.

1689356 is a deficient number, since it is larger than the sum of its proper divisors (1267024).

1689356 is a wasteful number, since it uses less digits than its factorization.

1689356 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 422343 (or 422341 counting only the distinct ones).

The product of its digits is 38880, while the sum is 38.

The square root of 1689356 is about 1299.7522840911. The cubic root of 1689356 is about 119.0987105551.

The spelling of 1689356 in words is "one million, six hundred eighty-nine thousand, three hundred fifty-six".