189484979 has 2 divisors, whose sum is σ = 189484980. Its totient is φ = 189484978.

The previous prime is 189484937. The next prime is 189484993. The reversal of 189484979 is 979484981.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 189484979 - 2¹⁶ = 189419443 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (189484279) 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, 94742489 + 94742490.

It is an arithmetic number, because the mean of its divisors is an integer number (94742490).

Almost surely, 2^189484979 is an apocalyptic number.

189484979 is a deficient number, since it is larger than the sum of its proper divisors (1).

189484979 is an equidigital number, since it uses as much as digits as its factorization.

189484979 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5225472, while the sum is 59.

The square root of 189484979 is about 13765.3542998355. The cubic root of 189484979 is about 574.3697987754.

The spelling of 189484979 in words is "one hundred eighty-nine million, four hundred eighty-four thousand, nine hundred seventy-nine".