998824859 has 2 divisors, whose sum is σ = 998824860. Its totient is φ = 998824858.

The previous prime is 998824843. The next prime is 998824891. The reversal of 998824859 is 958428899.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 998824859 - 2⁴ = 998824843 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (998824459) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 499412429 + 499412430.

It is an arithmetic number, because the mean of its divisors is an integer number (499412430).

Almost surely, 2^998824859 is an apocalyptic number.

998824859 is a deficient number, since it is larger than the sum of its proper divisors (1).

998824859 is an equidigital number, since it uses as much as digits as its factorization.

998824859 is an evil number, because the sum of its binary digits is even.

The product of its digits is 14929920, while the sum is 62.

The square root of 998824859 is about 31604.1905291055. The cubic root of 998824859 is about 999.6081327935.

The spelling of 998824859 in words is "nine hundred ninety-eight million, eight hundred twenty-four thousand, eight hundred fifty-nine".