9085770721 has 8 divisors (see below), whose sum is σ = 9720756800. Its totient is φ = 8466463440.

The previous prime is 9085770713. The next prime is 9085770779. The reversal of 9085770721 is 1270775809.

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 9085770721 - 2³ = 9085770713 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (9085770821) 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 in 7 ways as a sum of consecutive naturals, for example, 3918501 + ... + 3920818.

It is an arithmetic number, because the mean of its divisors is an integer number (1215094600).

Almost surely, 2^9085770721 is an apocalyptic number.

It is an amenable number.

9085770721 is a deficient number, since it is larger than the sum of its proper divisors (634986079).

9085770721 is a wasteful number, since it uses less digits than its factorization.

9085770721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7839399.

The product of its (nonzero) digits is 246960, while the sum is 46.

The square root of 9085770721 is about 95319.3092767672. The cubic root of 9085770721 is about 2086.6707310595.

The spelling of 9085770721 in words is "nine billion, eighty-five million, seven hundred seventy thousand, seven hundred twenty-one".