189133493 has 2 divisors, whose sum is σ = 189133494. Its totient is φ = 189133492.

The previous prime is 189133487. The next prime is 189133501. The reversal of 189133493 is 394331981.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 149279524 + 39853969 = 12218^2 + 6313^2 .

It is an emirp because it is prime and its reverse (394331981) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 189133493 - 2⁸ = 189133237 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 189133493.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (189133403) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 94566746 + 94566747.

It is an arithmetic number, because the mean of its divisors is an integer number (94566747).

Almost surely, 2^189133493 is an apocalyptic number.

It is an amenable number.

189133493 is a deficient number, since it is larger than the sum of its proper divisors (1).

189133493 is an equidigital number, since it uses as much as digits as its factorization.

189133493 is an evil number, because the sum of its binary digits is even.

The product of its digits is 69984, while the sum is 41.

The square root of 189133493 is about 13752.5813213375. The cubic root of 189133493 is about 574.0144356910.

The spelling of 189133493 in words is "one hundred eighty-nine million, one hundred thirty-three thousand, four hundred ninety-three".