188900017 has 2 divisors, whose sum is σ = 188900018. Its totient is φ = 188900016.

The previous prime is 188899987. The next prime is 188900021. The reversal of 188900017 is 710009881.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 187799616 + 1100401 = 13704^2 + 1049^2 .

It is a cyclic number.

It is not a de Polignac number, because 188900017 - 2⁷ = 188899889 is a prime.

It is not a weakly prime, because it can be changed into another prime (188900057) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 94450008 + 94450009.

It is an arithmetic number, because the mean of its divisors is an integer number (94450009).

Almost surely, 2^188900017 is an apocalyptic number.

It is an amenable number.

188900017 is a deficient number, since it is larger than the sum of its proper divisors (1).

188900017 is an equidigital number, since it uses as much as digits as its factorization.

188900017 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4032, while the sum is 34.

The square root of 188900017 is about 13744.0902572706. The cubic root of 188900017 is about 573.7781408980.

Adding to 188900017 its reverse (710009881), we get a palindrome (898909898).

The spelling of 188900017 in words is "one hundred eighty-eight million, nine hundred thousand, seventeen".