189212923 has 2 divisors, whose sum is σ = 189212924. Its totient is φ = 189212922.

The previous prime is 189212893. The next prime is 189212939. The reversal of 189212923 is 329212981.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 189212923 - 2⁹ = 189212411 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is not a weakly prime, because it can be changed into another prime (189212123) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 94606461 + 94606462.

It is an arithmetic number, because the mean of its divisors is an integer number (94606462).

Almost surely, 2^189212923 is an apocalyptic number.

189212923 is a deficient number, since it is larger than the sum of its proper divisors (1).

189212923 is an equidigital number, since it uses as much as digits as its factorization.

189212923 is an evil number, because the sum of its binary digits is even.

The product of its digits is 15552, while the sum is 37.

The square root of 189212923 is about 13755.4688397015. The cubic root of 189212923 is about 574.0947803278.

The spelling of 189212923 in words is "one hundred eighty-nine million, two hundred twelve thousand, nine hundred twenty-three".