1606987 has 8 divisors (see below), whose sum is σ = 1694880. Its totient is φ = 1520640.

The previous prime is 1606981. The next prime is 1606991. The reversal of 1606987 is 7896061.

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 1606987 - 2⁷ = 1606859 is a prime.

It is a Duffinian number.

1606987 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (1606981) 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, 2187 + ... + 2827.

It is an arithmetic number, because the mean of its divisors is an integer number (211860).

2^1606987 is an apocalyptic number.

1606987 is a deficient number, since it is larger than the sum of its proper divisors (87893).

1606987 is a wasteful number, since it uses less digits than its factorization.

1606987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 773.

The product of its (nonzero) digits is 18144, while the sum is 37.

The square root of 1606987 is about 1267.6699097162. The cubic root of 1606987 is about 117.1307132393.

The spelling of 1606987 in words is "one million, six hundred six thousand, nine hundred eighty-seven".