189587326657 has 2 divisors, whose sum is σ = 189587326658. Its totient is φ = 189587326656.

The previous prime is 189587326639. The next prime is 189587326661. The reversal of 189587326657 is 756623785981.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 189134530816 + 452795841 = 434896^2 + 21279^2 .

It is a cyclic number.

It is not a de Polignac number, because 189587326657 - 2³⁵ = 155227588289 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 189587326592 and 189587326601.

It is not a weakly prime, because it can be changed into another prime (189587326457) 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, 94793663328 + 94793663329.

It is an arithmetic number, because the mean of its divisors is an integer number (94793663329).

Almost surely, 2^189587326657 is an apocalyptic number.

It is an amenable number.

189587326657 is a deficient number, since it is larger than the sum of its proper divisors (1).

189587326657 is an equidigital number, since it uses as much as digits as its factorization.

189587326657 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 152409600, while the sum is 67.

The spelling of 189587326657 in words is "one hundred eighty-nine billion, five hundred eighty-seven million, three hundred twenty-six thousand, six hundred fifty-seven".