189205405429 has 2 divisors, whose sum is σ = 189205405430. Its totient is φ = 189205405428.

The previous prime is 189205405423. The next prime is 189205405439. The reversal of 189205405429 is 924504502981.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 161444847204 + 27760558225 = 401802^2 + 166615^2 .

It is an emirp because it is prime and its reverse (924504502981) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 189205405429 - 2⁵ = 189205405397 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (189205405423) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 94602702714 + 94602702715.

It is an arithmetic number, because the mean of its divisors is an integer number (94602702715).

Almost surely, 2^189205405429 is an apocalyptic number.

It is an amenable number.

189205405429 is a deficient number, since it is larger than the sum of its proper divisors (1).

189205405429 is an equidigital number, since it uses as much as digits as its factorization.

189205405429 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1036800, while the sum is 49.

The spelling of 189205405429 in words is "one hundred eighty-nine billion, two hundred five million, four hundred five thousand, four hundred twenty-nine".