998123321927 has 2 divisors, whose sum is σ = 998123321928. Its totient is φ = 998123321926.

The previous prime is 998123321879. The next prime is 998123321957. The reversal of 998123321927 is 729123321899.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 998123321927 - 2¹⁶ = 998123256391 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (998123321957) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 499061660963 + 499061660964.

It is an arithmetic number, because the mean of its divisors is an integer number (499061660964).

Almost surely, 2^998123321927 is an apocalyptic number.

998123321927 is a deficient number, since it is larger than the sum of its proper divisors (1).

998123321927 is an equidigital number, since it uses as much as digits as its factorization.

998123321927 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2939328, while the sum is 56.

The spelling of 998123321927 in words is "nine hundred ninety-eight billion, one hundred twenty-three million, three hundred twenty-one thousand, nine hundred twenty-seven".