189010901 has 2 divisors, whose sum is σ = 189010902. Its totient is φ = 189010900.

The previous prime is 189010891. The next prime is 189010903. The reversal of 189010901 is 109010981.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 182115025 + 6895876 = 13495^2 + 2626^2 .

It is an emirp because it is prime and its reverse (109010981) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-189010901 is a prime.

It is a Sophie Germain prime.

Together with 189010903, it forms a pair of twin primes.

It is a Chen prime.

It is an alternating number because its digits alternate between odd and even.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (189010903) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 94505450 + 94505451.

It is an arithmetic number, because the mean of its divisors is an integer number (94505451).

Almost surely, 2^189010901 is an apocalyptic number.

It is an amenable number.

189010901 is a deficient number, since it is larger than the sum of its proper divisors (1).

189010901 is an equidigital number, since it uses as much as digits as its factorization.

189010901 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 648, while the sum is 29.

The square root of 189010901 is about 13748.1235446878. The cubic root of 189010901 is about 573.8903878804.

The spelling of 189010901 in words is "one hundred eighty-nine million, ten thousand, nine hundred one".