189166801 has 2 divisors, whose sum is σ = 189166802.
Its totient is φ = 189166800.
The previous prime is 189166799. The next prime is 189166807. The reversal of 189166801 is 108661981.
189166801 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.
It is a weak prime.
It can be written as a sum of positive squares in only one way, i.e., 167029776 + 22137025 = 12924^2 + 4705^2
It is an emirp because it is prime and its reverse (108661981) is a distict prime.
It is also a bemirp because it and its reverse can be mirrored producing other two distinct primes, 108991681 and 186199801.
It is a cyclic number.
It is not a de Polignac number, because 189166801 - 21 = 189166799 is a prime.
Together with 189166799, it forms a pair of twin primes.
It is not a weakly prime, because it can be changed into another prime (189166807) by changing a digit.
It is a polite number, since it can be written as a sum of consecutive naturals, namely, 94583400 + 94583401.
It is an arithmetic number, because the mean of its divisors is an integer number (94583401).
Almost surely, 2189166801 is an apocalyptic number.
It is an amenable number.
189166801 is a deficient number, since it is larger than the sum of its proper divisors (1).
189166801 is an equidigital number, since it uses as much as digits as its factorization.
189166801 is an evil number, because the sum of its binary digits is even.
The product of its (nonzero) digits is 20736, while the sum is 40.
The square root of 189166801 is about 13753.7922406877.
The cubic root of 189166801 is about 574.0481299709.
The spelling of 189166801 in words is "one hundred eighty-nine million, one hundred sixty-six thousand, eight hundred one".