998691003 has 6 divisors (see below), whose sum is σ = 1442553684. Its totient is φ = 665793996.

The previous prime is 998690999. The next prime is 998691007. The reversal of 998691003 is 300196899.

It is an interprime number because it is at equal distance from previous prime (998690999) and next prime (998691007).

It is not a de Polignac number, because 998691003 - 2² = 998690999 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 998691003.

It is not an unprimeable number, because it can be changed into a prime (998691007) 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 5 ways as a sum of consecutive naturals, for example, 55482825 + ... + 55482842.

It is an arithmetic number, because the mean of its divisors is an integer number (240425614).

Almost surely, 2^998691003 is an apocalyptic number.

998691003 is a deficient number, since it is larger than the sum of its proper divisors (443862681).

998691003 is a wasteful number, since it uses less digits than its factorization.

998691003 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 110965673 (or 110965670 counting only the distinct ones).

The product of its (nonzero) digits is 104976, while the sum is 45.

The square root of 998691003 is about 31602.0727642982. The cubic root of 998691003 is about 999.5634771422.

The spelling of 998691003 in words is "nine hundred ninety-eight million, six hundred ninety-one thousand, three".