1689965 has 8 divisors (see below), whose sum is σ = 2093568. Its totient is φ = 1308240.

The previous prime is 1689931. The next prime is 1689967. The reversal of 1689965 is 5699861.

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

It is not a de Polignac number, because 1689965 - 2¹² = 1685869 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 (1689967) 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, 5297 + ... + 5606.

It is an arithmetic number, because the mean of its divisors is an integer number (261696).

2^1689965 is an apocalyptic number.

It is an amenable number.

1689965 is a deficient number, since it is larger than the sum of its proper divisors (403603).

1689965 is a wasteful number, since it uses less digits than its factorization.

1689965 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10939.

The product of its digits is 116640, while the sum is 44.

The square root of 1689965 is about 1299.9865383918. The cubic root of 1689965 is about 119.1130202291.

The spelling of 1689965 in words is "one million, six hundred eighty-nine thousand, nine hundred sixty-five".