189612911 has 2 divisors, whose sum is σ = 189612912. Its totient is φ = 189612910.

The previous prime is 189612893. The next prime is 189612923. The reversal of 189612911 is 119216981.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-189612911 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (189612811) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 94806455 + 94806456.

It is an arithmetic number, because the mean of its divisors is an integer number (94806456).

Almost surely, 2^189612911 is an apocalyptic number.

189612911 is a deficient number, since it is larger than the sum of its proper divisors (1).

189612911 is an equidigital number, since it uses as much as digits as its factorization.

189612911 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7776, while the sum is 38.

The square root of 189612911 is about 13770.0003994190. Note that the first 3 decimals coincide. The cubic root of 189612911 is about 574.4990328477.

The spelling of 189612911 in words is "one hundred eighty-nine million, six hundred twelve thousand, nine hundred eleven".