9061721 has 2 divisors, whose sum is σ = 9061722. Its totient is φ = 9061720.

The previous prime is 9061711. The next prime is 9061739. The reversal of 9061721 is 1271609.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 5017600 + 4044121 = 2240^2 + 2011^2 .

It is an emirp because it is prime and its reverse (1271609) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 9061721 - 2¹⁰ = 9060697 is a prime.

It is a super-2 number, since 2×9061721² = 164229574963682, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (9061711) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4530860 + 4530861.

It is an arithmetic number, because the mean of its divisors is an integer number (4530861).

Almost surely, 2^9061721 is an apocalyptic number.

It is an amenable number.

9061721 is a deficient number, since it is larger than the sum of its proper divisors (1).

9061721 is an equidigital number, since it uses as much as digits as its factorization.

9061721 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 756, while the sum is 26.

The square root of 9061721 is about 3010.2692570599. The cubic root of 9061721 is about 208.4827989114.

The spelling of 9061721 in words is "nine million, sixty-one thousand, seven hundred twenty-one".