8460740221 has 2 divisors, whose sum is σ = 8460740222. Its totient is φ = 8460740220.

The previous prime is 8460740177. The next prime is 8460740237. The reversal of 8460740221 is 1220470648.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 4676644996 + 3784095225 = 68386^2 + 61515^2 .

It is a cyclic number.

It is not a de Polignac number, because 8460740221 - 2¹⁷ = 8460609149 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8460740291) 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, 4230370110 + 4230370111.

It is an arithmetic number, because the mean of its divisors is an integer number (4230370111).

Almost surely, 2^8460740221 is an apocalyptic number.

It is an amenable number.

8460740221 is a deficient number, since it is larger than the sum of its proper divisors (1).

8460740221 is an equidigital number, since it uses as much as digits as its factorization.

8460740221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 21504, while the sum is 34.

The square root of 8460740221 is about 91982.2821036747. The cubic root of 8460740221 is about 2037.6806445830.

The spelling of 8460740221 in words is "eight billion, four hundred sixty million, seven hundred forty thousand, two hundred twenty-one".