9097159721 has 8 divisors (see below), whose sum is σ = 9798426120. Its totient is φ = 8396105472.

The previous prime is 9097159703. The next prime is 9097159751. The reversal of 9097159721 is 1279517909.

It can be written as a sum of positive squares in 4 ways, for example, as 1458399721 + 7638760000 = 38189^2 + 87400^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 9097159721 - 2⁶ = 9097159657 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 9097159721.

It is not an unprimeable number, because it can be changed into a prime (9097159751) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 42401 + ... + 141393.

It is an arithmetic number, because the mean of its divisors is an integer number (1224803265).

Almost surely, 2^9097159721 is an apocalyptic number.

It is an amenable number.

9097159721 is a deficient number, since it is larger than the sum of its proper divisors (701266399).

9097159721 is a wasteful number, since it uses less digits than its factorization.

9097159721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 106075.

The product of its (nonzero) digits is 357210, while the sum is 50.

The square root of 9097159721 is about 95379.0318728388. The cubic root of 9097159721 is about 2087.5422465592.

The spelling of 9097159721 in words is "nine billion, ninety-seven million, one hundred fifty-nine thousand, seven hundred twenty-one".