189691419121 has 2 divisors, whose sum is σ = 189691419122. Its totient is φ = 189691419120.

The previous prime is 189691419109. The next prime is 189691419131. The reversal of 189691419121 is 121914196981.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 172483226721 + 17208192400 = 415311^2 + 131180^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-189691419121 is a prime.

It is not a weakly prime, because it can be changed into another prime (189691419131) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 94845709560 + 94845709561.

It is an arithmetic number, because the mean of its divisors is an integer number (94845709561).

Almost surely, 2^189691419121 is an apocalyptic number.

It is an amenable number.

189691419121 is a deficient number, since it is larger than the sum of its proper divisors (1).

189691419121 is an equidigital number, since it uses as much as digits as its factorization.

189691419121 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 279936, while the sum is 52.

The spelling of 189691419121 in words is "one hundred eighty-nine billion, six hundred ninety-one million, four hundred nineteen thousand, one hundred twenty-one".