1689694 has 4 divisors (see below), whose sum is σ = 2534544. Its totient is φ = 844846.

The previous prime is 1689661. The next prime is 1689703. The reversal of 1689694 is 4969861.

It is a semiprime because it is the product of two primes.

It is a self number, because there is not a number n which added to its sum of digits gives 1689694.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 422422 + ... + 422425.

It is an arithmetic number, because the mean of its divisors is an integer number (633636).

2^1689694 is an apocalyptic number.

1689694 is a deficient number, since it is larger than the sum of its proper divisors (844850).

1689694 is an equidigital number, since it uses as much as digits as its factorization.

1689694 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 844849.

The product of its digits is 93312, while the sum is 43.

The square root of 1689694 is about 1299.8823023643. The cubic root of 1689694 is about 119.1066529662.

The spelling of 1689694 in words is "one million, six hundred eighty-nine thousand, six hundred ninety-four".