9068587721 has 2 divisors, whose sum is σ = 9068587722. Its totient is φ = 9068587720.

The previous prime is 9068587711. The next prime is 9068587741. The reversal of 9068587721 is 1277858609.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 5382276496 + 3686311225 = 73364^2 + 60715^2 .

It is an emirp because it is prime and its reverse (1277858609) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 9068587721 - 2⁶ = 9068587657 is a prime.

It is not a weakly prime, because it can be changed into another prime (9068587711) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4534293860 + 4534293861.

It is an arithmetic number, because the mean of its divisors is an integer number (4534293861).

Almost surely, 2^9068587721 is an apocalyptic number.

It is an amenable number.

9068587721 is a deficient number, since it is larger than the sum of its proper divisors (1).

9068587721 is an equidigital number, since it uses as much as digits as its factorization.

9068587721 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1693440, while the sum is 53.

The square root of 9068587721 is about 95229.1327325835. The cubic root of 9068587721 is about 2085.3544644415.

The spelling of 9068587721 in words is "nine billion, sixty-eight million, five hundred eighty-seven thousand, seven hundred twenty-one".