188089729 has 2 divisors, whose sum is σ = 188089730. Its totient is φ = 188089728.

The previous prime is 188089691. The next prime is 188089747. The reversal of 188089729 is 927980881.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 165508225 + 22581504 = 12865^2 + 4752^2 .

It is a cyclic number.

It is not a de Polignac number, because 188089729 - 2¹¹ = 188087681 is a prime.

It is not a weakly prime, because it can be changed into another prime (188089229) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 94044864 + 94044865.

It is an arithmetic number, because the mean of its divisors is an integer number (94044865).

Almost surely, 2^188089729 is an apocalyptic number.

It is an amenable number.

188089729 is a deficient number, since it is larger than the sum of its proper divisors (1).

188089729 is an equidigital number, since it uses as much as digits as its factorization.

188089729 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 580608, while the sum is 52.

The square root of 188089729 is about 13714.5808904246. The cubic root of 188089729 is about 572.9565565391.

The spelling of 188089729 in words is "one hundred eighty-eight million, eighty-nine thousand, seven hundred twenty-nine".