998421323 has 2 divisors, whose sum is σ = 998421324. Its totient is φ = 998421322.

The previous prime is 998421301. The next prime is 998421341. The reversal of 998421323 is 323124899.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 998421323 - 2¹² = 998417227 is a prime.

It is not a weakly prime, because it can be changed into another prime (998421223) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 499210661 + 499210662.

It is an arithmetic number, because the mean of its divisors is an integer number (499210662).

Almost surely, 2^998421323 is an apocalyptic number.

998421323 is a deficient number, since it is larger than the sum of its proper divisors (1).

998421323 is an equidigital number, since it uses as much as digits as its factorization.

998421323 is an evil number, because the sum of its binary digits is even.

The product of its digits is 93312, while the sum is 41.

The square root of 998421323 is about 31597.8056674827. The cubic root of 998421323 is about 999.4734971768.

The spelling of 998421323 in words is "nine hundred ninety-eight million, four hundred twenty-one thousand, three hundred twenty-three".