189364311973 has 2 divisors, whose sum is σ = 189364311974. Its totient is φ = 189364311972.

The previous prime is 189364311947. The next prime is 189364312013. The reversal of 189364311973 is 379113463981.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 102564546049 + 86799765924 = 320257^2 + 294618^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-189364311973 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (189364321973) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 94682155986 + 94682155987.

It is an arithmetic number, because the mean of its divisors is an integer number (94682155987).

Almost surely, 2^189364311973 is an apocalyptic number.

It is an amenable number.

189364311973 is a deficient number, since it is larger than the sum of its proper divisors (1).

189364311973 is an equidigital number, since it uses as much as digits as its factorization.

189364311973 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2939328, while the sum is 55.

The spelling of 189364311973 in words is "one hundred eighty-nine billion, three hundred sixty-four million, three hundred eleven thousand, nine hundred seventy-three".