1010009985 has 16 divisors (see below), whose sum is σ = 1635488064. Its totient is φ = 532181312.

The previous prime is 1010009981. The next prime is 1010009993. The reversal of 1010009985 is 5899000101.

It is a cyclic number.

It is not a de Polignac number, because 1010009985 - 2² = 1010009981 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1010009981) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 404382 + ... + 406871.

It is an arithmetic number, because the mean of its divisors is an integer number (102218004).

Almost surely, 2^1010009985 is an apocalyptic number.

1010009985 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1010009985 is a deficient number, since it is larger than the sum of its proper divisors (625478079).

1010009985 is an equidigital number, since it uses as much as digits as its factorization.

1010009985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 811344.

The product of its (nonzero) digits is 3240, while the sum is 33.

The square root of 1010009985 is about 31780.6542569532. The cubic root of 1010009985 is about 1003.3255898589.

The spelling of 1010009985 in words is "one billion, ten million, nine thousand, nine hundred eighty-five".