9993413921 has 8 divisors (see below), whose sum is σ = 10318708224. Its totient is φ = 9668302560.

The previous prime is 9993413917. The next prime is 9993413933. The reversal of 9993413921 is 1293143999.

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 9993413921 - 2² = 9993413917 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 9993413921.

It is not an unprimeable number, because it can be changed into a prime (9993413951) 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, 69980 + ... + 157746.

It is an arithmetic number, because the mean of its divisors is an integer number (1289838528).

Almost surely, 2^9993413921 is an apocalyptic number.

It is an amenable number.

9993413921 is a deficient number, since it is larger than the sum of its proper divisors (325294303).

9993413921 is a wasteful number, since it uses less digits than its factorization.

9993413921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 91471.

The product of its digits is 472392, while the sum is 50.

The square root of 9993413921 is about 99967.0641811592. The cubic root of 9993413921 is about 2153.9616102564.

The spelling of 9993413921 in words is "nine billion, nine hundred ninety-three million, four hundred thirteen thousand, nine hundred twenty-one".