2001961843 has 8 divisors (see below), whose sum is σ = 2366851680. Its totient is φ = 1656795840.

The previous prime is 2001961807. The next prime is 2001961859. The reversal of 2001961843 is 3481691002.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 2001961843 - 2¹⁷ = 2001830771 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2001961799 and 2001961808.

It is not an unprimeable number, because it can be changed into a prime (2001961873) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4930738 + ... + 4931143.

It is an arithmetic number, because the mean of its divisors is an integer number (295856460).

Almost surely, 2^2001961843 is an apocalyptic number.

2001961843 is a deficient number, since it is larger than the sum of its proper divisors (364889837).

2001961843 is an equidigital number, since it uses as much as digits as its factorization.

2001961843 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9861917.

The product of its (nonzero) digits is 10368, while the sum is 34.

The square root of 2001961843 is about 44743.2882452776. The cubic root of 2001961843 is about 1260.3328764831.

The spelling of 2001961843 in words is "two billion, one million, nine hundred sixty-one thousand, eight hundred forty-three".