189371393 has 2 divisors, whose sum is σ = 189371394. Its totient is φ = 189371392.

The previous prime is 189371383. The next prime is 189371419. The reversal of 189371393 is 393173981.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 187607809 + 1763584 = 13697^2 + 1328^2 .

It is a cyclic number.

It is not a de Polignac number, because 189371393 - 2¹⁴ = 189355009 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (189371323) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 94685696 + 94685697.

It is an arithmetic number, because the mean of its divisors is an integer number (94685697).

Almost surely, 2^189371393 is an apocalyptic number.

It is an amenable number.

189371393 is a deficient number, since it is larger than the sum of its proper divisors (1).

189371393 is an equidigital number, since it uses as much as digits as its factorization.

189371393 is an evil number, because the sum of its binary digits is even.

The product of its digits is 122472, while the sum is 44.

The square root of 189371393 is about 13761.2278885280. The cubic root of 189371393 is about 574.2550079554.

The spelling of 189371393 in words is "one hundred eighty-nine million, three hundred seventy-one thousand, three hundred ninety-three".