1017985203 has 12 divisors (see below), whose sum is σ = 1492370568. Its totient is φ = 668527200.

The previous prime is 1017985183. The next prime is 1017985217. The reversal of 1017985203 is 3025897101.

It is not a de Polignac number, because 1017985203 - 2¹⁰ = 1017984179 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1017985253) 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 11 ways as a sum of consecutive naturals, for example, 843498 + ... + 844703.

It is an arithmetic number, because the mean of its divisors is an integer number (124364214).

Almost surely, 2^1017985203 is an apocalyptic number.

1017985203 is a deficient number, since it is larger than the sum of its proper divisors (474385365).

1017985203 is a wasteful number, since it uses less digits than its factorization.

1017985203 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1688274 (or 1688271 counting only the distinct ones).

The product of its (nonzero) digits is 15120, while the sum is 36.

The square root of 1017985203 is about 31905.8803827758. The cubic root of 1017985203 is about 1005.9594816934.

The spelling of 1017985203 in words is "one billion, seventeen million, nine hundred eighty-five thousand, two hundred three".