9221664587 has 2 divisors, whose sum is σ = 9221664588. Its totient is φ = 9221664586.

The previous prime is 9221664583. The next prime is 9221664653. The reversal of 9221664587 is 7854661229.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 9221664587 - 2² = 9221664583 is a prime.

It is not a weakly prime, because it can be changed into another prime (9221664583) 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, 4610832293 + 4610832294.

It is an arithmetic number, because the mean of its divisors is an integer number (4610832294).

Almost surely, 2^9221664587 is an apocalyptic number.

9221664587 is a deficient number, since it is larger than the sum of its proper divisors (1).

9221664587 is an equidigital number, since it uses as much as digits as its factorization.

9221664587 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1451520, while the sum is 50.

The square root of 9221664587 is about 96029.4985251928. The cubic root of 9221664587 is about 2097.0225822973.

The spelling of 9221664587 in words is "nine billion, two hundred twenty-one million, six hundred sixty-four thousand, five hundred eighty-seven".