8012581943 has 4 divisors (see below), whose sum is σ = 8015544600. Its totient is φ = 8009619288.

The previous prime is 8012581939. The next prime is 8012581963. The reversal of 8012581943 is 3491852108.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 8012581943 - 2² = 8012581939 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 8012581943.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8012581963) 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, 1477268 + ... + 1482681.

It is an arithmetic number, because the mean of its divisors is an integer number (2003886150).

Almost surely, 2^8012581943 is an apocalyptic number.

8012581943 is a deficient number, since it is larger than the sum of its proper divisors (2962657).

8012581943 is a wasteful number, since it uses less digits than its factorization.

8012581943 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2962656.

The product of its (nonzero) digits is 69120, while the sum is 41.

The square root of 8012581943 is about 89513.0266665137. The cubic root of 8012581943 is about 2001.0479460586.

The spelling of 8012581943 in words is "eight billion, twelve million, five hundred eighty-one thousand, nine hundred forty-three".