189719103968291 has 2 divisors, whose sum is σ = 189719103968292. Its totient is φ = 189719103968290.

The previous prime is 189719103968231. The next prime is 189719103968309. The reversal of 189719103968291 is 192869301917981.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 189719103968291 - 2⁴² = 185321057457187 is a prime.

It is not a weakly prime, because it can be changed into another prime (189719103968221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 94859551984145 + 94859551984146.

It is an arithmetic number, because the mean of its divisors is an integer number (94859551984146).

Almost surely, 2^{189719103968291} is an apocalyptic number.

189719103968291 is a deficient number, since it is larger than the sum of its proper divisors (1).

189719103968291 is an equidigital number, since it uses as much as digits as its factorization.

189719103968291 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 105815808, while the sum is 74.

The spelling of 189719103968291 in words is "one hundred eighty-nine trillion, seven hundred nineteen billion, one hundred three million, nine hundred sixty-eight thousand, two hundred ninety-one".