1789681361 has 8 divisors (see below), whose sum is σ = 1927871400. Its totient is φ = 1651565952.

The previous prime is 1789681357. The next prime is 1789681363. The reversal of 1789681361 is 1631869871.

It can be written as a sum of positive squares in 4 ways, for example, as 88943761 + 1700737600 = 9431^2 + 41240^2 .

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 1789681361 - 2² = 1789681357 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1789681363) 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, 37415 + ... + 70563.

It is an arithmetic number, because the mean of its divisors is an integer number (240983925).

Almost surely, 2^1789681361 is an apocalyptic number.

It is an amenable number.

1789681361 is a deficient number, since it is larger than the sum of its proper divisors (138190039).

1789681361 is a wasteful number, since it uses less digits than its factorization.

1789681361 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37315.

The product of its digits is 435456, while the sum is 50.

The square root of 1789681361 is about 42304.6257636207. The cubic root of 1789681361 is about 1214.1114970509. Note that the first 3 decimals are identical.

The spelling of 1789681361 in words is "one billion, seven hundred eighty-nine million, six hundred eighty-one thousand, three hundred sixty-one".