189392813 has 2 divisors, whose sum is σ = 189392814. Its totient is φ = 189392812.

The previous prime is 189392771. The next prime is 189392831. The reversal of 189392813 is 318293981.

Together with next prime (189392831) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 189392644 + 169 = 13762^2 + 13^2 .

It is a cyclic number.

It is not a de Polignac number, because 189392813 - 2¹⁶ = 189327277 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (189392843) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 94696406 + 94696407.

It is an arithmetic number, because the mean of its divisors is an integer number (94696407).

Almost surely, 2^189392813 is an apocalyptic number.

It is an amenable number.

189392813 is a deficient number, since it is larger than the sum of its proper divisors (1).

189392813 is an equidigital number, since it uses as much as digits as its factorization.

189392813 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 93312, while the sum is 44.

The square root of 189392813 is about 13762.0061400945. The cubic root of 189392813 is about 574.2766586711.

The spelling of 189392813 in words is "one hundred eighty-nine million, three hundred ninety-two thousand, eight hundred thirteen".