999061859 has 2 divisors, whose sum is σ = 999061860. Its totient is φ = 999061858.

The previous prime is 999061853. The next prime is 999061891. The reversal of 999061859 is 958160999.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 999061859 - 2²⁴ = 982284643 is a prime.

It is not a weakly prime, because it can be changed into another prime (999061853) 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, 499530929 + 499530930.

It is an arithmetic number, because the mean of its divisors is an integer number (499530930).

Almost surely, 2^999061859 is an apocalyptic number.

999061859 is a deficient number, since it is larger than the sum of its proper divisors (1).

999061859 is an equidigital number, since it uses as much as digits as its factorization.

999061859 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1574640, while the sum is 56.

The square root of 999061859 is about 31607.9398094846. The cubic root of 999061859 is about 999.6871884925.

The spelling of 999061859 in words is "nine hundred ninety-nine million, sixty-one thousand, eight hundred fifty-nine".