9993915 has 32 divisors (see below), whose sum is σ = 17908800. Its totient is φ = 5287680.

The previous prime is 9993913. The next prime is 9993917. The reversal of 9993915 is 5193999.

It is an interprime number because it is at equal distance from previous prime (9993913) and next prime (9993917).

It is not a de Polignac number, because 9993915 - 2¹ = 9993913 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a nude number because it is divisible by every one of its digits.

It is not an unprimeable number, because it can be changed into a prime (9993911) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 24231 + ... + 24639.

It is an arithmetic number, because the mean of its divisors is an integer number (559650).

Almost surely, 2^9993915 is an apocalyptic number.

9993915 is a deficient number, since it is larger than the sum of its proper divisors (7914885).

9993915 is a wasteful number, since it uses less digits than its factorization.

9993915 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 604 (or 598 counting only the distinct ones).

The product of its digits is 98415, while the sum is 45.

The square root of 9993915 is about 3161.3153907828. The cubic root of 9993915 is about 215.3997610196.

The spelling of 9993915 in words is "nine million, nine hundred ninety-three thousand, nine hundred fifteen".