1720016689 has 8 divisors (see below), whose sum is σ = 1741442112. Its totient is φ = 1698723600.

The previous prime is 1720016687. The next prime is 1720016713. The reversal of 1720016689 is 9866100271.

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 1720016689 - 2¹ = 1720016687 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1720016681) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6799 + ... + 59044.

It is an arithmetic number, because the mean of its divisors is an integer number (217680264).

Almost surely, 2^1720016689 is an apocalyptic number.

It is an amenable number.

1720016689 is a deficient number, since it is larger than the sum of its proper divisors (21425423).

1720016689 is a wasteful number, since it uses less digits than its factorization.

1720016689 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66167.

The product of its (nonzero) digits is 36288, while the sum is 40.

The square root of 1720016689 is about 41473.0839099289. The cubic root of 1720016689 is about 1198.1491581306.

The spelling of 1720016689 in words is "one billion, seven hundred twenty million, sixteen thousand, six hundred eighty-nine".