998691193 has 4 divisors (see below), whose sum is σ = 1008387328. Its totient is φ = 988995060.

The previous prime is 998691191. The next prime is 998691217. The reversal of 998691193 is 391196899.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 998691193 - 2¹ = 998691191 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (998691191) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4847913 + ... + 4848118.

It is an arithmetic number, because the mean of its divisors is an integer number (252096832).

Almost surely, 2^998691193 is an apocalyptic number.

It is an amenable number.

998691193 is a deficient number, since it is larger than the sum of its proper divisors (9696135).

998691193 is a wasteful number, since it uses less digits than its factorization.

998691193 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9696134.

The product of its digits is 944784, while the sum is 55.

The square root of 998691193 is about 31602.0757704300. The cubic root of 998691193 is about 999.5635405308.

The spelling of 998691193 in words is "nine hundred ninety-eight million, six hundred ninety-one thousand, one hundred ninety-three".