1687089 has 8 divisors (see below), whose sum is σ = 2310400. Its totient is φ = 1094256.

The previous prime is 1687087. The next prime is 1687111. The reversal of 1687089 is 9807861.

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

It is not a de Polignac number, because 1687089 - 2¹ = 1687087 is a prime.

It is a Duffinian number.

1687089 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (1687087) 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, 7489 + ... + 7710.

It is an arithmetic number, because the mean of its divisors is an integer number (288800).

2^1687089 is an apocalyptic number.

It is an amenable number.

1687089 is a deficient number, since it is larger than the sum of its proper divisors (623311).

1687089 is a wasteful number, since it uses less digits than its factorization.

1687089 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15239.

The product of its (nonzero) digits is 24192, while the sum is 39.

The square root of 1687089 is about 1298.8799020695. The cubic root of 1687089 is about 119.0454126042.

The spelling of 1687089 in words is "one million, six hundred eighty-seven thousand, eighty-nine".