1998623103 has 16 divisors (see below), whose sum is σ = 2760978432. Its totient is φ = 1284660000.

The previous prime is 1998623059. The next prime is 1998623153. The reversal of 1998623103 is 3013268991.

It is not a de Polignac number, because 1998623103 - 2¹⁴ = 1998606719 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1998623153) 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 15 ways as a sum of consecutive naturals, for example, 14448 + ... + 64853.

It is an arithmetic number, because the mean of its divisors is an integer number (172561152).

Almost surely, 2^1998623103 is an apocalyptic number.

1998623103 is a deficient number, since it is larger than the sum of its proper divisors (762355329).

1998623103 is a wasteful number, since it uses less digits than its factorization.

1998623103 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 79606.

The product of its (nonzero) digits is 69984, while the sum is 42.

The square root of 1998623103 is about 44705.9627231089. The cubic root of 1998623103 is about 1259.6318532667.

The spelling of 1998623103 in words is "one billion, nine hundred ninety-eight million, six hundred twenty-three thousand, one hundred three".