9993913 has 2 divisors, whose sum is σ = 9993914. Its totient is φ = 9993912.

The previous prime is 9993911. The next prime is 9993917. The reversal of 9993913 is 3193999.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 8219689 + 1774224 = 2867^2 + 1332^2 .

It is a cyclic number.

It is not a de Polignac number, because 9993913 - 2¹ = 9993911 is a prime.

Together with 9993911, it forms a pair of twin primes.

9993913 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 9993913.

It is not a weakly prime, because it can be changed into another prime (9993911) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4996956 + 4996957.

It is an arithmetic number, because the mean of its divisors is an integer number (4996957).

Almost surely, 2^9993913 is an apocalyptic number.

It is an amenable number.

9993913 is a deficient number, since it is larger than the sum of its proper divisors (1).

9993913 is an equidigital number, since it uses as much as digits as its factorization.

9993913 is an evil number, because the sum of its binary digits is even.

The product of its digits is 59049, while the sum is 43.

The square root of 9993913 is about 3161.3150744587. The cubic root of 9993913 is about 215.3997466509.

The spelling of 9993913 in words is "nine million, nine hundred ninety-three thousand, nine hundred thirteen".