998396939 has 2 divisors, whose sum is σ = 998396940. Its totient is φ = 998396938.

The previous prime is 998396921. The next prime is 998396951. The reversal of 998396939 is 939693899.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 998396939 - 2⁸ = 998396683 is a prime.

It is not a weakly prime, because it can be changed into another prime (998396909) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 499198469 + 499198470.

It is an arithmetic number, because the mean of its divisors is an integer number (499198470).

Almost surely, 2^998396939 is an apocalyptic number.

998396939 is a deficient number, since it is larger than the sum of its proper divisors (1).

998396939 is an equidigital number, since it uses as much as digits as its factorization.

998396939 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 25509168, while the sum is 65.

The square root of 998396939 is about 31597.4198155482. The cubic root of 998396939 is about 999.4653605449.

The spelling of 998396939 in words is "nine hundred ninety-eight million, three hundred ninety-six thousand, nine hundred thirty-nine".