1689205601 has 8 divisors (see below), whose sum is σ = 1753910400. Its totient is φ = 1624931280.

The previous prime is 1689205597. The next prime is 1689205603. The reversal of 1689205601 is 1065029861.

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

It is a cyclic number.

It is not a de Polignac number, because 1689205601 - 2² = 1689205597 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1689205603) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 99611 + ... + 115328.

It is an arithmetic number, because the mean of its divisors is an integer number (219238800).

Almost surely, 2^1689205601 is an apocalyptic number.

It is an amenable number.

1689205601 is a deficient number, since it is larger than the sum of its proper divisors (64704799).

1689205601 is a wasteful number, since it uses less digits than its factorization.

1689205601 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 215239.

The product of its (nonzero) digits is 25920, while the sum is 38.

The square root of 1689205601 is about 41099.9464841501. The cubic root of 1689205601 is about 1190.9517610001.

The spelling of 1689205601 in words is "one billion, six hundred eighty-nine million, two hundred five thousand, six hundred one".