872730006221 has 2 divisors, whose sum is σ = 872730006222. Its totient is φ = 872730006220.

The previous prime is 872730006167. The next prime is 872730006341. The reversal of 872730006221 is 122600037278.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 695897982025 + 176832024196 = 834205^2 + 420514^2 .

It is a cyclic number.

It is not a de Polignac number, because 872730006221 - 2¹⁴ = 872729989837 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (872730006821) 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 as a sum of consecutive naturals, namely, 436365003110 + 436365003111.

It is an arithmetic number, because the mean of its divisors is an integer number (436365003111).

Almost surely, 2^872730006221 is an apocalyptic number.

It is an amenable number.

872730006221 is a deficient number, since it is larger than the sum of its proper divisors (1).

872730006221 is an equidigital number, since it uses as much as digits as its factorization.

872730006221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 56448, while the sum is 38.

The spelling of 872730006221 in words is "eight hundred seventy-two billion, seven hundred thirty million, six thousand, two hundred twenty-one".