1689653 has 8 divisors (see below), whose sum is σ = 1940160. Its totient is φ = 1441440.

The previous prime is 1689641. The next prime is 1689659. The reversal of 1689653 is 3569861.

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

It is not a de Polignac number, because 1689653 - 2⁸ = 1689397 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 (1689659) 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, 1538 + ... + 2396.

It is an arithmetic number, because the mean of its divisors is an integer number (242520).

2^1689653 is an apocalyptic number.

It is an amenable number.

1689653 is a deficient number, since it is larger than the sum of its proper divisors (250507).

1689653 is an equidigital number, since it uses as much as digits as its factorization.

1689653 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1147.

The product of its digits is 38880, while the sum is 38.

The square root of 1689653 is about 1299.8665316101. The cubic root of 1689653 is about 119.1056895941.

The spelling of 1689653 in words is "one million, six hundred eighty-nine thousand, six hundred fifty-three".