998133439 has 2 divisors, whose sum is σ = 998133440. Its totient is φ = 998133438.

The previous prime is 998133421. The next prime is 998133473. The reversal of 998133439 is 934331899.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 998133439 - 2²¹ = 996036287 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 998133392 and 998133401.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (998133419) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 499066719 + 499066720.

It is an arithmetic number, because the mean of its divisors is an integer number (499066720).

Almost surely, 2^998133439 is an apocalyptic number.

998133439 is a deficient number, since it is larger than the sum of its proper divisors (1).

998133439 is an equidigital number, since it uses as much as digits as its factorization.

998133439 is an evil number, because the sum of its binary digits is even.

The product of its digits is 629856, while the sum is 49.

The square root of 998133439 is about 31593.2498961408. The cubic root of 998133439 is about 999.3774254814.

The spelling of 998133439 in words is "nine hundred ninety-eight million, one hundred thirty-three thousand, four hundred thirty-nine".