1989202173 has 32 divisors (see below), whose sum is σ = 3185817600. Its totient is φ = 1079407296.

The previous prime is 1989202139. The next prime is 1989202199. The reversal of 1989202173 is 3712029891.

It is not a de Polignac number, because 1989202173 - 2⁶ = 1989202109 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1989202073) 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 31 ways as a sum of consecutive naturals, for example, 52323 + ... + 81951.

It is an arithmetic number, because the mean of its divisors is an integer number (99556800).

Almost surely, 2^1989202173 is an apocalyptic number.

It is an amenable number.

1989202173 is a deficient number, since it is larger than the sum of its proper divisors (1196615427).

1989202173 is a wasteful number, since it uses less digits than its factorization.

1989202173 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29801.

The product of its (nonzero) digits is 54432, while the sum is 42.

The square root of 1989202173 is about 44600.4727889739. The cubic root of 1989202173 is about 1257.6495555215.

The spelling of 1989202173 in words is "one billion, nine hundred eighty-nine million, two hundred two thousand, one hundred seventy-three".