1689554 has 4 divisors (see below), whose sum is σ = 2534334. Its totient is φ = 844776.

The previous prime is 1689553. The next prime is 1689601. The reversal of 1689554 is 4559861.

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

It can be written as a sum of positive squares in only one way, i.e., 1092025 + 597529 = 1045^2 + 773^2 .

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (1689551) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 422387 + ... + 422390.

2^1689554 is an apocalyptic number.

1689554 is a deficient number, since it is larger than the sum of its proper divisors (844780).

1689554 is an equidigital number, since it uses as much as digits as its factorization.

1689554 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 844779.

The product of its digits is 43200, while the sum is 38.

The square root of 1689554 is about 1299.8284502195. The cubic root of 1689554 is about 119.1033633386.

The spelling of 1689554 in words is "one million, six hundred eighty-nine thousand, five hundred fifty-four".