998806859 has 2 divisors, whose sum is σ = 998806860. Its totient is φ = 998806858.

The previous prime is 998806843. The next prime is 998806871. The reversal of 998806859 is 958608899.

It is a happy number.

998806859 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 998806859 - 2⁴ = 998806843 is a prime.

It is a super-3 number, since 3×998806859³ (a number of 28 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (998806819) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 499403429 + 499403430.

It is an arithmetic number, because the mean of its divisors is an integer number (499403430).

Almost surely, 2^998806859 is an apocalyptic number.

998806859 is a deficient number, since it is larger than the sum of its proper divisors (1).

998806859 is an equidigital number, since it uses as much as digits as its factorization.

998806859 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 11197440, while the sum is 62.

The square root of 998806859 is about 31603.9057554600. The cubic root of 998806859 is about 999.6021280522.

The spelling of 998806859 in words is "nine hundred ninety-eight million, eight hundred six thousand, eight hundred fifty-nine".