1689311 has 8 divisors (see below), whose sum is σ = 1831200. Its totient is φ = 1549152.

The previous prime is 1689287. The next prime is 1689319. The reversal of 1689311 is 1139861.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1689311 - 2¹⁴ = 1672927 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1689319) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2261 + ... + 2913.

It is an arithmetic number, because the mean of its divisors is an integer number (228900).

2^1689311 is an apocalyptic number.

1689311 is a deficient number, since it is larger than the sum of its proper divisors (141889).

1689311 is a wasteful number, since it uses less digits than its factorization.

1689311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 865.

The product of its digits is 1296, while the sum is 29.

The square root of 1689311 is about 1299.7349729849. The cubic root of 1689311 is about 119.0976530536.

The spelling of 1689311 in words is "one million, six hundred eighty-nine thousand, three hundred eleven".