8001939987947 has 2 divisors, whose sum is σ = 8001939987948. Its totient is φ = 8001939987946.

The previous prime is 8001939987883. The next prime is 8001939987953. The reversal of 8001939987947 is 7497899391008.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 8001939987947 - 2⁶ = 8001939987883 is a prime.

It is not a weakly prime, because it can be changed into another prime (8001939987047) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4000969993973 + 4000969993974.

It is an arithmetic number, because the mean of its divisors is an integer number (4000969993974).

Almost surely, 2^{8001939987947} is an apocalyptic number.

8001939987947 is a deficient number, since it is larger than the sum of its proper divisors (1).

8001939987947 is an equidigital number, since it uses as much as digits as its factorization.

8001939987947 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 246903552, while the sum is 74.

The spelling of 8001939987947 in words is "eight trillion, one billion, nine hundred thirty-nine million, nine hundred eighty-seven thousand, nine hundred forty-seven".