189166693 has 2 divisors, whose sum is σ = 189166694. Its totient is φ = 189166692.

The previous prime is 189166687. The next prime is 189166709. The reversal of 189166693 is 396661981.

189166693 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 188430529 + 736164 = 13727^2 + 858^2 .

It is an emirp because it is prime and its reverse (396661981) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-189166693 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (189166613) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 94583346 + 94583347.

It is an arithmetic number, because the mean of its divisors is an integer number (94583347).

Almost surely, 2^189166693 is an apocalyptic number.

It is an amenable number.

189166693 is a deficient number, since it is larger than the sum of its proper divisors (1).

189166693 is an equidigital number, since it uses as much as digits as its factorization.

189166693 is an evil number, because the sum of its binary digits is even.

The product of its digits is 419904, while the sum is 49.

The square root of 189166693 is about 13753.7883144972. The cubic root of 189166693 is about 574.0480207248.

The spelling of 189166693 in words is "one hundred eighty-nine million, one hundred sixty-six thousand, six hundred ninety-three".