1689011 has 4 divisors (see below), whose sum is σ = 1704072. Its totient is φ = 1673952.

The previous prime is 1688987. The next prime is 1689031. The reversal of 1689011 is 1109861.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1689011 is a prime.

It is a Duffinian number.

It is a plaindrome in base 15.

It is not an unprimeable number, because it can be changed into a prime (1689031) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7361 + ... + 7586.

It is an arithmetic number, because the mean of its divisors is an integer number (426018).

2^1689011 is an apocalyptic number.

1689011 is a deficient number, since it is larger than the sum of its proper divisors (15061).

1689011 is a wasteful number, since it uses less digits than its factorization.

1689011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15060.

The product of its (nonzero) digits is 432, while the sum is 26.

The square root of 1689011 is about 1299.6195597174. The cubic root of 1689011 is about 119.0906025635.

The spelling of 1689011 in words is "one million, six hundred eighty-nine thousand, eleven".