1000319985 has 24 divisors (see below), whose sum is σ = 1981586880. Its totient is φ = 457288992.

The previous prime is 1000319959. The next prime is 1000320011. The reversal of 1000319985 is 5899130001.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (1000319959) and next prime (1000320011).

It is not a de Polignac number, because 1000319985 - 2¹¹ = 1000317937 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1587495 + ... + 1588124.

It is an arithmetic number, because the mean of its divisors is an integer number (82566120).

Almost surely, 2^1000319985 is an apocalyptic number.

1000319985 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1000319985 is a deficient number, since it is larger than the sum of its proper divisors (981266895).

1000319985 is a wasteful number, since it uses less digits than its factorization.

1000319985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3175637 (or 3175634 counting only the distinct ones).

The product of its (nonzero) digits is 9720, while the sum is 36.

The square root of 1000319985 is about 31627.8356041004. The cubic root of 1000319985 is about 1000.1066502920.

Adding to 1000319985 its reverse (5899130001), we get a palindrome (6899449986).

The spelling of 1000319985 in words is "one billion, three hundred nineteen thousand, nine hundred eighty-five".