2043081961 has 4 divisors (see below), whose sum is σ = 2043936000. Its totient is φ = 2042227924.

The previous prime is 2043081917. The next prime is 2043081979. The reversal of 2043081961 is 1691803402.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2043081961 - 2¹⁵ = 2043049193 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2043081361) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 423421 + ... + 428218.

It is an arithmetic number, because the mean of its divisors is an integer number (510984000).

Almost surely, 2^2043081961 is an apocalyptic number.

It is an amenable number.

2043081961 is a deficient number, since it is larger than the sum of its proper divisors (854039).

2043081961 is an equidigital number, since it uses as much as digits as its factorization.

2043081961 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 854038.

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

The square root of 2043081961 is about 45200.4641679707. The cubic root of 2043081961 is about 1268.9035033245.

The spelling of 2043081961 in words is "two billion, forty-three million, eighty-one thousand, nine hundred sixty-one".