189430673 has 2 divisors, whose sum is σ = 189430674. Its totient is φ = 189430672.

The previous prime is 189430649. The next prime is 189430721. The reversal of 189430673 is 376034981.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 187333969 + 2096704 = 13687^2 + 1448^2 .

It is a cyclic number.

It is not a de Polignac number, because 189430673 - 2¹⁰ = 189429649 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 189430673.

It is not a weakly prime, because it can be changed into another prime (189430273) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 94715336 + 94715337.

It is an arithmetic number, because the mean of its divisors is an integer number (94715337).

Almost surely, 2^189430673 is an apocalyptic number.

It is an amenable number.

189430673 is a deficient number, since it is larger than the sum of its proper divisors (1).

189430673 is an equidigital number, since it uses as much as digits as its factorization.

189430673 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 108864, while the sum is 41.

The square root of 189430673 is about 13763.3815975581. The cubic root of 189430673 is about 574.3149224702.

The spelling of 189430673 in words is "one hundred eighty-nine million, four hundred thirty thousand, six hundred seventy-three".