1989785373 has 8 divisors (see below), whose sum is σ = 2709495168. Its totient is φ = 1298299584.

The previous prime is 1989785353. The next prime is 1989785387. The reversal of 1989785373 is 3735879891.

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

It is not a de Polignac number, because 1989785373 - 2⁸ = 1989785117 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1989785353) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7055836 + ... + 7056117.

It is an arithmetic number, because the mean of its divisors is an integer number (338686896).

Almost surely, 2^1989785373 is an apocalyptic number.

It is an amenable number.

1989785373 is a deficient number, since it is larger than the sum of its proper divisors (719709795).

1989785373 is a wasteful number, since it uses less digits than its factorization.

1989785373 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14112003.

The product of its digits is 11430720, while the sum is 60.

The square root of 1989785373 is about 44607.0103571176. The cubic root of 1989785373 is about 1257.7724506137.

The spelling of 1989785373 in words is "one billion, nine hundred eighty-nine million, seven hundred eighty-five thousand, three hundred seventy-three".