789993321221047 has 2 divisors, whose sum is σ = 789993321221048. Its totient is φ = 789993321221046.

The previous prime is 789993321220973. The next prime is 789993321221077. The reversal of 789993321221047 is 740122123399987.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-789993321221047 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (789993321221077) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 394996660610523 + 394996660610524.

It is an arithmetic number, because the mean of its divisors is an integer number (394996660610524).

Almost surely, 2^{789993321221047} is an apocalyptic number.

789993321221047 is a deficient number, since it is larger than the sum of its proper divisors (1).

789993321221047 is an equidigital number, since it uses as much as digits as its factorization.

789993321221047 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 82301184, while the sum is 67.

The spelling of 789993321221047 in words is "seven hundred eighty-nine trillion, nine hundred ninety-three billion, three hundred twenty-one million, two hundred twenty-one thousand, forty-seven".