189213473 has 2 divisors, whose sum is σ = 189213474. Its totient is φ = 189213472.

The previous prime is 189213443. The next prime is 189213481. The reversal of 189213473 is 374312981.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 148547344 + 40666129 = 12188^2 + 6377^2 .

It is a cyclic number.

It is not a de Polignac number, because 189213473 - 2⁸ = 189213217 is a prime.

It is not a weakly prime, because it can be changed into another prime (189213403) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 94606736 + 94606737.

It is an arithmetic number, because the mean of its divisors is an integer number (94606737).

Almost surely, 2^189213473 is an apocalyptic number.

It is an amenable number.

189213473 is a deficient number, since it is larger than the sum of its proper divisors (1).

189213473 is an equidigital number, since it uses as much as digits as its factorization.

189213473 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 36288, while the sum is 38.

The square root of 189213473 is about 13755.4888317355. The cubic root of 189213473 is about 574.0953365827.

The spelling of 189213473 in words is "one hundred eighty-nine million, two hundred thirteen thousand, four hundred seventy-three".