998133397 has 8 divisors (see below), whose sum is σ = 1057737240. Its totient is φ = 940208640.

The previous prime is 998133373. The next prime is 998133413. The reversal of 998133397 is 793331899.

It can be written as a sum of positive squares in 4 ways, for example, as 19131876 + 979001521 = 4374^2 + 31289^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-998133397 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (998133317) 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 in 7 ways as a sum of consecutive naturals, for example, 418548 + ... + 420925.

It is an arithmetic number, because the mean of its divisors is an integer number (132217155).

Almost surely, 2^998133397 is an apocalyptic number.

It is an amenable number.

998133397 is a deficient number, since it is larger than the sum of its proper divisors (59603843).

998133397 is a wasteful number, since it uses less digits than its factorization.

998133397 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 839543.

The product of its digits is 1102248, while the sum is 52.

The square root of 998133397 is about 31593.2492314418. The cubic root of 998133397 is about 999.3774114640.

The spelling of 998133397 in words is "nine hundred ninety-eight million, one hundred thirty-three thousand, three hundred ninety-seven".