999993913 has 2 divisors, whose sum is σ = 999993914. Its totient is φ = 999993912.

The previous prime is 999993901. The next prime is 999993947. The reversal of 999993913 is 319399999.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 902221369 + 97772544 = 30037^2 + 9888^2 .

It is a cyclic number.

It is not a de Polignac number, because 999993913 - 2²¹ = 997896761 is a prime.

It is a super-3 number, since 3×999993913³ (a number of 28 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (999990913) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 499996956 + 499996957.

It is an arithmetic number, because the mean of its divisors is an integer number (499996957).

Almost surely, 2^999993913 is an apocalyptic number.

It is an amenable number.

999993913 is a deficient number, since it is larger than the sum of its proper divisors (1).

999993913 is an equidigital number, since it uses as much as digits as its factorization.

999993913 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4782969, while the sum is 61.

The square root of 999993913 is about 31622.6803576167. The cubic root of 999993913 is about 999.9979709959.

The spelling of 999993913 in words is "nine hundred ninety-nine million, nine hundred ninety-three thousand, nine hundred thirteen".