189118873 has 2 divisors, whose sum is σ = 189118874. Its totient is φ = 189118872.

The previous prime is 189118871. The next prime is 189118927. The reversal of 189118873 is 378811981.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 189117504 + 1369 = 13752^2 + 37^2 .

It is a cyclic number.

It is not a de Polignac number, because 189118873 - 2¹ = 189118871 is a prime.

Together with 189118871, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (189118871) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 94559436 + 94559437.

It is an arithmetic number, because the mean of its divisors is an integer number (94559437).

Almost surely, 2^189118873 is an apocalyptic number.

It is an amenable number.

189118873 is a deficient number, since it is larger than the sum of its proper divisors (1).

189118873 is an equidigital number, since it uses as much as digits as its factorization.

189118873 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 96768, while the sum is 46.

The square root of 189118873 is about 13752.0497744882. The cubic root of 189118873 is about 573.9996448905. Note that the first 3 decimals are identical.

The spelling of 189118873 in words is "one hundred eighty-nine million, one hundred eighteen thousand, eight hundred seventy-three".