2001239711 has 16 divisors (see below), whose sum is σ = 2150323200. Its totient is φ = 1855848960.

The previous prime is 2001239701. The next prime is 2001239717. The reversal of 2001239711 is 1179321002.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2001239711 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2001239717) 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, 318581 + ... + 324801.

It is an arithmetic number, because the mean of its divisors is an integer number (134395200).

Almost surely, 2^2001239711 is an apocalyptic number.

2001239711 is a deficient number, since it is larger than the sum of its proper divisors (149083489).

2001239711 is a wasteful number, since it uses less digits than its factorization.

2001239711 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6514.

The product of its (nonzero) digits is 756, while the sum is 26.

The square root of 2001239711 is about 44735.2177931437. The cubic root of 2001239711 is about 1260.1813191233.

The spelling of 2001239711 in words is "two billion, one million, two hundred thirty-nine thousand, seven hundred eleven".