1999445179 has 2 divisors, whose sum is σ = 1999445180. Its totient is φ = 1999445178.

The previous prime is 1999445143. The next prime is 1999445197. The reversal of 1999445179 is 9715449991.

Together with next prime (1999445197) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1999445179 - 2¹⁵ = 1999412411 is a prime.

It is not a weakly prime, because it can be changed into another prime (1997445179) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 999722589 + 999722590.

It is an arithmetic number, because the mean of its divisors is an integer number (999722590).

Almost surely, 2^1999445179 is an apocalyptic number.

1999445179 is a deficient number, since it is larger than the sum of its proper divisors (1).

1999445179 is an equidigital number, since it uses as much as digits as its factorization.

1999445179 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3674160, while the sum is 58.

The square root of 1999445179 is about 44715.1560323790. The cubic root of 1999445179 is about 1259.8045340105.

The spelling of 1999445179 in words is "one billion, nine hundred ninety-nine million, four hundred forty-five thousand, one hundred seventy-nine".