9913121 has 8 divisors (see below), whose sum is σ = 10130400. Its totient is φ = 9697600.

The previous prime is 9913097. The next prime is 9913129. The reversal of 9913121 is 1213199.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-9913121 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a nialpdrome in base 16.

It is not an unprimeable number, because it can be changed into a prime (9913129) 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, 23450 + ... + 23868.

It is an arithmetic number, because the mean of its divisors is an integer number (1266300).

Almost surely, 2^9913121 is an apocalyptic number.

It is an amenable number.

9913121 is a deficient number, since it is larger than the sum of its proper divisors (217279).

9913121 is a wasteful number, since it uses less digits than its factorization.

9913121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 879.

The product of its digits is 486, while the sum is 26.

The square root of 9913121 is about 3148.5109178785. The cubic root of 9913121 is about 214.8177362835.

The spelling of 9913121 in words is "nine million, nine hundred thirteen thousand, one hundred twenty-one".