998973311 has 4 divisors (see below), whose sum is σ = 1141683792. Its totient is φ = 856262832.

The previous prime is 998973307. The next prime is 998973319. The reversal of 998973311 is 113379899.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 998973311 - 2² = 998973307 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 998973311.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (998973319) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 71355230 + ... + 71355243.

It is an arithmetic number, because the mean of its divisors is an integer number (285420948).

Almost surely, 2^998973311 is an apocalyptic number.

998973311 is a deficient number, since it is larger than the sum of its proper divisors (142710481).

998973311 is a wasteful number, since it uses less digits than its factorization.

998973311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 142710480.

The product of its digits is 367416, while the sum is 50.

The square root of 998973311 is about 31606.5390544425. The cubic root of 998973311 is about 999.6576531453.

The spelling of 998973311 in words is "nine hundred ninety-eight million, nine hundred seventy-three thousand, three hundred eleven".