189140408929 has 2 divisors, whose sum is σ = 189140408930. Its totient is φ = 189140408928.

The previous prime is 189140408927. The next prime is 189140408983. The reversal of 189140408929 is 929804041981.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 159021500625 + 30118908304 = 398775^2 + 173548^2 .

It is a cyclic number.

It is not a de Polignac number, because 189140408929 - 2¹ = 189140408927 is a prime.

Together with 189140408927, 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 189140408929.

It is not a weakly prime, because it can be changed into another prime (189140408927) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 94570204464 + 94570204465.

It is an arithmetic number, because the mean of its divisors is an integer number (94570204465).

Almost surely, 2^189140408929 is an apocalyptic number.

It is an amenable number.

189140408929 is a deficient number, since it is larger than the sum of its proper divisors (1).

189140408929 is an equidigital number, since it uses as much as digits as its factorization.

189140408929 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1492992, while the sum is 55.

The spelling of 189140408929 in words is "one hundred eighty-nine billion, one hundred forty million, four hundred eight thousand, nine hundred twenty-nine".