188034989 has 2 divisors, whose sum is σ = 188034990. Its totient is φ = 188034988.

The previous prime is 188034983. The next prime is 188034991. The reversal of 188034989 is 989430881.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 169260100 + 18774889 = 13010^2 + 4333^2 .

It is a cyclic number.

It is not a de Polignac number, because 188034989 - 2²⁰ = 186986413 is a prime.

Together with 188034991, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (188034983) 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 as a sum of consecutive naturals, namely, 94017494 + 94017495.

It is an arithmetic number, because the mean of its divisors is an integer number (94017495).

Almost surely, 2^188034989 is an apocalyptic number.

It is an amenable number.

188034989 is a deficient number, since it is larger than the sum of its proper divisors (1).

188034989 is an equidigital number, since it uses as much as digits as its factorization.

188034989 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 497664, while the sum is 50.

The square root of 188034989 is about 13712.5850589887. The cubic root of 188034989 is about 572.9009683806.

The spelling of 188034989 in words is "one hundred eighty-eight million, thirty-four thousand, nine hundred eighty-nine".