189886429 has 2 divisors, whose sum is σ = 189886430. Its totient is φ = 189886428.

The previous prime is 189886427. The next prime is 189886441. The reversal of 189886429 is 924688981.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 189612900 + 273529 = 13770^2 + 523^2 .

It is an emirp because it is prime and its reverse (924688981) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 189886429 - 2¹ = 189886427 is a prime.

Together with 189886427, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 189886429.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (189886423) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 94943214 + 94943215.

It is an arithmetic number, because the mean of its divisors is an integer number (94943215).

Almost surely, 2^189886429 is an apocalyptic number.

It is an amenable number.

189886429 is a deficient number, since it is larger than the sum of its proper divisors (1).

189886429 is an equidigital number, since it uses as much as digits as its factorization.

189886429 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1990656, while the sum is 55.

The square root of 189886429 is about 13779.9284831236. The cubic root of 189886429 is about 574.7751398026.

The spelling of 189886429 in words is "one hundred eighty-nine million, eight hundred eighty-six thousand, four hundred twenty-nine".