189612893 has 2 divisors, whose sum is σ = 189612894. Its totient is φ = 189612892.

The previous prime is 189612889. The next prime is 189612911. The reversal of 189612893 is 398216981.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 172081924 + 17530969 = 13118^2 + 4187^2 .

It is a cyclic number.

It is not a de Polignac number, because 189612893 - 2² = 189612889 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (189612793) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 94806446 + 94806447.

It is an arithmetic number, because the mean of its divisors is an integer number (94806447).

Almost surely, 2^189612893 is an apocalyptic number.

It is an amenable number.

189612893 is a deficient number, since it is larger than the sum of its proper divisors (1).

189612893 is an equidigital number, since it uses as much as digits as its factorization.

189612893 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 186624, while the sum is 47.

The square root of 189612893 is about 13769.9997458243. Note that the first 3 decimals coincide. The cubic root of 189612893 is about 574.4990146686.

The spelling of 189612893 in words is "one hundred eighty-nine million, six hundred twelve thousand, eight hundred ninety-three".