9688173021 has 16 divisors (see below), whose sum is σ = 14355731520. Its totient is φ = 6457484880.

The previous prime is 9688173013. The next prime is 9688173031. The reversal of 9688173021 is 1203718869.

It is not a de Polignac number, because 9688173021 - 2³ = 9688173013 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9688173031) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 111946 + ... + 178628.

It is an arithmetic number, because the mean of its divisors is an integer number (897233220).

Almost surely, 2^9688173021 is an apocalyptic number.

It is an amenable number.

9688173021 is a deficient number, since it is larger than the sum of its proper divisors (4667558499).

9688173021 is a wasteful number, since it uses less digits than its factorization.

9688173021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72073 (or 72067 counting only the distinct ones).

The product of its (nonzero) digits is 145152, while the sum is 45.

The square root of 9688173021 is about 98428.5173158674. The cubic root of 9688173021 is about 2131.8041112393.

The spelling of 9688173021 in words is "nine billion, six hundred eighty-eight million, one hundred seventy-three thousand, twenty-one".