189520679 has 2 divisors, whose sum is σ = 189520680. Its totient is φ = 189520678.

The previous prime is 189520673. The next prime is 189520729. The reversal of 189520679 is 976025981.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 189520679 - 2¹⁶ = 189455143 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (189520673) 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, 94760339 + 94760340.

It is an arithmetic number, because the mean of its divisors is an integer number (94760340).

Almost surely, 2^189520679 is an apocalyptic number.

189520679 is a deficient number, since it is larger than the sum of its proper divisors (1).

189520679 is an equidigital number, since it uses as much as digits as its factorization.

189520679 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 272160, while the sum is 47.

The square root of 189520679 is about 13766.6509725496. The cubic root of 189520679 is about 574.4058679743.

The spelling of 189520679 in words is "one hundred eighty-nine million, five hundred twenty thousand, six hundred seventy-nine".