791262284921 has 2 divisors, whose sum is σ = 791262284922. Its totient is φ = 791262284920.

The previous prime is 791262284899. The next prime is 791262284987. The reversal of 791262284921 is 129482262197.

791262284921 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 579905095225 + 211357189696 = 761515^2 + 459736^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-791262284921 is a prime.

It is not a weakly prime, because it can be changed into another prime (791262284321) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 395631142460 + 395631142461.

It is an arithmetic number, because the mean of its divisors is an integer number (395631142461).

Almost surely, 2^791262284921 is an apocalyptic number.

It is an amenable number.

791262284921 is a deficient number, since it is larger than the sum of its proper divisors (1).

791262284921 is an equidigital number, since it uses as much as digits as its factorization.

791262284921 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1741824, while the sum is 53.

The spelling of 791262284921 in words is "seven hundred ninety-one billion, two hundred sixty-two million, two hundred eighty-four thousand, nine hundred twenty-one".