189681288193 has 2 divisors, whose sum is σ = 189681288194. Its totient is φ = 189681288192.

The previous prime is 189681288191. The next prime is 189681288221. The reversal of 189681288193 is 391882186981.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 165626208784 + 24055079409 = 406972^2 + 155097^2 .

It is a cyclic number.

It is not a de Polignac number, because 189681288193 - 2¹ = 189681288191 is a prime.

Together with 189681288191, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (189681288191) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 94840644096 + 94840644097.

It is an arithmetic number, because the mean of its divisors is an integer number (94840644097).

Almost surely, 2^189681288193 is an apocalyptic number.

It is an amenable number.

189681288193 is a deficient number, since it is larger than the sum of its proper divisors (1).

189681288193 is an equidigital number, since it uses as much as digits as its factorization.

189681288193 is an evil number, because the sum of its binary digits is even.

The product of its digits is 11943936, while the sum is 64.

The spelling of 189681288193 in words is "one hundred eighty-nine billion, six hundred eighty-one million, two hundred eighty-eight thousand, one hundred ninety-three".