998133394 has 4 divisors (see below), whose sum is σ = 1497200094. Its totient is φ = 499066696.

The previous prime is 998133373. The next prime is 998133413. The reversal of 998133394 is 493331899.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 493331899 = 23 ⋅21449213.

It can be written as a sum of positive squares in only one way, i.e., 647957025 + 350176369 = 25455^2 + 18713^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 249533347 + ... + 249533350.

Almost surely, 2^998133394 is an apocalyptic number.

998133394 is a deficient number, since it is larger than the sum of its proper divisors (499066700).

998133394 is a wasteful number, since it uses less digits than its factorization.

998133394 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 499066699.

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

The square root of 998133394 is about 31593.2491839633. The cubic root of 998133394 is about 999.3774104627.

The spelling of 998133394 in words is "nine hundred ninety-eight million, one hundred thirty-three thousand, three hundred ninety-four".