189385326131 has 2 divisors, whose sum is σ = 189385326132. Its totient is φ = 189385326130.

The previous prime is 189385326113. The next prime is 189385326199. The reversal of 189385326131 is 131623583981.

Together with previous prime (189385326113) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-189385326131 is a prime.

It is a super-2 number, since 2×189385326131² (a number of 23 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a self number, because there is not a number n which added to its sum of digits gives 189385326131.

It is not a weakly prime, because it can be changed into another prime (189385326331) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 94692663065 + 94692663066.

It is an arithmetic number, because the mean of its divisors is an integer number (94692663066).

Almost surely, 2^189385326131 is an apocalyptic number.

189385326131 is a deficient number, since it is larger than the sum of its proper divisors (1).

189385326131 is an equidigital number, since it uses as much as digits as its factorization.

189385326131 is an evil number, because the sum of its binary digits is even.

The product of its digits is 933120, while the sum is 50.

The spelling of 189385326131 in words is "one hundred eighty-nine billion, three hundred eighty-five million, three hundred twenty-six thousand, one hundred thirty-one".