189212893 has 2 divisors, whose sum is σ = 189212894. Its totient is φ = 189212892.

The previous prime is 189212867. The next prime is 189212923. The reversal of 189212893 is 398212981.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 188732644 + 480249 = 13738^2 + 693^2 .

It is a cyclic number.

It is not a de Polignac number, because 189212893 - 2⁹ = 189212381 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (189215893) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 94606446 + 94606447.

It is an arithmetic number, because the mean of its divisors is an integer number (94606447).

Almost surely, 2^189212893 is an apocalyptic number.

It is an amenable number.

189212893 is a deficient number, since it is larger than the sum of its proper divisors (1).

189212893 is an equidigital number, since it uses as much as digits as its factorization.

189212893 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 62208, while the sum is 43.

The square root of 189212893 is about 13755.4677492261. The cubic root of 189212893 is about 574.0947499866.

The spelling of 189212893 in words is "one hundred eighty-nine million, two hundred twelve thousand, eight hundred ninety-three".