9069721730 has 8 divisors (see below), whose sum is σ = 16325499132. Its totient is φ = 3627888688.

The previous prime is 9069721729. The next prime is 9069721747. The reversal of 9069721730 is 371279609.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 8769011449 + 300710281 = 93643^2 + 17341^2 .

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

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 453486077 + ... + 453486096.

Almost surely, 2^9069721730 is an apocalyptic number.

9069721730 is a deficient number, since it is larger than the sum of its proper divisors (7255777402).

9069721730 is a wasteful number, since it uses less digits than its factorization.

9069721730 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 906972180.

The product of its (nonzero) digits is 142884, while the sum is 44.

The square root of 9069721730 is about 95235.0866540268. The cubic root of 9069721730 is about 2085.4413839722.

The spelling of 9069721730 in words is "nine billion, sixty-nine million, seven hundred twenty-one thousand, seven hundred thirty".