79471263707021 has 2 divisors, whose sum is σ = 79471263707022. Its totient is φ = 79471263707020.

The previous prime is 79471263706963. The next prime is 79471263707081. The reversal of 79471263707021 is 12070736217497.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 55067367306121 + 24403896400900 = 7420739^2 + 4940030^2 .

It is a cyclic number.

It is not a de Polignac number, because 79471263707021 - 2³⁴ = 79454083837837 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (79471263707081) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39735631853510 + 39735631853511.

It is an arithmetic number, because the mean of its divisors is an integer number (39735631853511).

Almost surely, 2^{79471263707021} is an apocalyptic number.

It is an amenable number.

79471263707021 is a deficient number, since it is larger than the sum of its proper divisors (1).

79471263707021 is an equidigital number, since it uses as much as digits as its factorization.

79471263707021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6223392, while the sum is 56.

The spelling of 79471263707021 in words is "seventy-nine trillion, four hundred seventy-one billion, two hundred sixty-three million, seven hundred seven thousand, twenty-one".