189865409053 has 2 divisors, whose sum is σ = 189865409054. Its totient is φ = 189865409052.

The previous prime is 189865409051. The next prime is 189865409087. The reversal of 189865409053 is 350904568981.

189865409053 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., 167164864164 + 22700544889 = 408858^2 + 150667^2 .

It is a cyclic number.

It is not a de Polignac number, because 189865409053 - 2¹ = 189865409051 is a prime.

It is a super-3 number, since 3×189865409053³ (a number of 35 digits) contains 333 as substring.

Together with 189865409051, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (189865409051) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 94932704526 + 94932704527.

It is an arithmetic number, because the mean of its divisors is an integer number (94932704527).

Almost surely, 2^189865409053 is an apocalyptic number.

It is an amenable number.

189865409053 is a deficient number, since it is larger than the sum of its proper divisors (1).

189865409053 is an equidigital number, since it uses as much as digits as its factorization.

189865409053 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 9331200, while the sum is 58.

The spelling of 189865409053 in words is "one hundred eighty-nine billion, eight hundred sixty-five million, four hundred nine thousand, fifty-three".