998931103 has 2 divisors, whose sum is σ = 998931104. Its totient is φ = 998931102.

The previous prime is 998931097. The next prime is 998931113. The reversal of 998931103 is 301139899.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-998931103 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 998931103.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (998931113) 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 as a sum of consecutive naturals, namely, 499465551 + 499465552.

It is an arithmetic number, because the mean of its divisors is an integer number (499465552).

Almost surely, 2^998931103 is an apocalyptic number.

998931103 is a deficient number, since it is larger than the sum of its proper divisors (1).

998931103 is an equidigital number, since it uses as much as digits as its factorization.

998931103 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 52488, while the sum is 43.

The square root of 998931103 is about 31605.8713374588. The cubic root of 998931103 is about 999.6435739756.

The spelling of 998931103 in words is "nine hundred ninety-eight million, nine hundred thirty-one thousand, one hundred three".