9161720353 has 2 divisors, whose sum is σ = 9161720354. Its totient is φ = 9161720352.

The previous prime is 9161720329. The next prime is 9161720363. The reversal of 9161720353 is 3530271619.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 8195318784 + 966401569 = 90528^2 + 31087^2 .

It is a cyclic number.

It is not a de Polignac number, because 9161720353 - 2⁹ = 9161719841 is a prime.

It is not a weakly prime, because it can be changed into another prime (9161720303) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4580860176 + 4580860177.

It is an arithmetic number, because the mean of its divisors is an integer number (4580860177).

Almost surely, 2^9161720353 is an apocalyptic number.

It is an amenable number.

9161720353 is a deficient number, since it is larger than the sum of its proper divisors (1).

9161720353 is an equidigital number, since it uses as much as digits as its factorization.

9161720353 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 34020, while the sum is 37.

The square root of 9161720353 is about 95716.8760094060. The cubic root of 9161720353 is about 2092.4688933843.

The spelling of 9161720353 in words is "nine billion, one hundred sixty-one million, seven hundred twenty thousand, three hundred fifty-three".