2001009747 has 16 divisors (see below), whose sum is σ = 2911317120. Its totient is φ = 1212417600.

The previous prime is 2001009743. The next prime is 2001009749. The reversal of 2001009747 is 7479001002.

It is not a de Polignac number, because 2001009747 - 2² = 2001009743 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2001009743) 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, 213847 + ... + 223007.

It is an arithmetic number, because the mean of its divisors is an integer number (181957320).

Almost surely, 2^2001009747 is an apocalyptic number.

2001009747 is a deficient number, since it is larger than the sum of its proper divisors (910307373).

2001009747 is a wasteful number, since it uses less digits than its factorization.

2001009747 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15794.

The product of its (nonzero) digits is 3528, while the sum is 30.

The square root of 2001009747 is about 44732.6474400968. The cubic root of 2001009747 is about 1260.1330478049.

The spelling of 2001009747 in words is "two billion, one million, nine thousand, seven hundred forty-seven".