1689045604 has 9 divisors (see below), whose sum is σ = 2955973657. Its totient is φ = 844481704.

The previous prime is 1689045599. The next prime is 1689045607. The reversal of 1689045604 is 4065409861.

The square root of 1689045604 is 41098.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 1656327204 + 32718400 = 40698^2 + 5720^2 .

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1689045607) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 71922 + ... + 92470.

Almost surely, 2^1689045604 is an apocalyptic number.

1689045604 is the 41098-th square number.

It is an amenable number.

1689045604 is a deficient number, since it is larger than the sum of its proper divisors (1266928053).

1689045604 is an frugal number, since it uses more digits than its factorization.

1689045604 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41102 (or 20551 counting only the distinct ones).

The product of its (nonzero) digits is 207360, while the sum is 43.

The cubic root of 1689045604 is about 1190.9141585664.

The spelling of 1689045604 in words is "one billion, six hundred eighty-nine million, forty-five thousand, six hundred four".