998368879 has 2 divisors, whose sum is σ = 998368880. Its totient is φ = 998368878.

The previous prime is 998368873. The next prime is 998368909. The reversal of 998368879 is 978863899.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-998368879 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (998368873) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 499184439 + 499184440.

It is an arithmetic number, because the mean of its divisors is an integer number (499184440).

Almost surely, 2^998368879 is an apocalyptic number.

998368879 is a deficient number, since it is larger than the sum of its proper divisors (1).

998368879 is an equidigital number, since it uses as much as digits as its factorization.

998368879 is an evil number, because the sum of its binary digits is even.

The product of its digits is 47029248, while the sum is 67.

The square root of 998368879 is about 31596.9757888314. The cubic root of 998368879 is about 999.4559971145.

The spelling of 998368879 in words is "nine hundred ninety-eight million, three hundred sixty-eight thousand, eight hundred seventy-nine".