1689079 has 6 divisors (see below), whose sum is σ = 1964904. Its totient is φ = 1447740.

The previous prime is 1689071. The next prime is 1689109. The reversal of 1689079 is 9709861.

It is not a de Polignac number, because 1689079 - 2³ = 1689071 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 (1689071) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 17187 + ... + 17284.

It is an arithmetic number, because the mean of its divisors is an integer number (327484).

2^1689079 is an apocalyptic number.

1689079 is a deficient number, since it is larger than the sum of its proper divisors (275825).

1689079 is an equidigital number, since it uses as much as digits as its factorization.

1689079 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34485 (or 34478 counting only the distinct ones).

The product of its (nonzero) digits is 27216, while the sum is 40.

The square root of 1689079 is about 1299.6457209563. The cubic root of 1689079 is about 119.0922007478.

The spelling of 1689079 in words is "one million, six hundred eighty-nine thousand, seventy-nine".