9931393 has 2 divisors, whose sum is σ = 9931394. Its totient is φ = 9931392.

The previous prime is 9931381. The next prime is 9931399. The reversal of 9931393 is 3931399.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9437184 + 494209 = 3072^2 + 703^2 .

It is an emirp because it is prime and its reverse (3931399) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 9931393 - 2¹³ = 9923201 is a prime.

It is not a weakly prime, because it can be changed into another prime (9931399) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4965696 + 4965697.

It is an arithmetic number, because the mean of its divisors is an integer number (4965697).

Almost surely, 2^9931393 is an apocalyptic number.

It is an amenable number.

9931393 is a deficient number, since it is larger than the sum of its proper divisors (1).

9931393 is an equidigital number, since it uses as much as digits as its factorization.

9931393 is an evil number, because the sum of its binary digits is even.

The product of its digits is 19683, while the sum is 37.

The square root of 9931393 is about 3151.4112711609. The cubic root of 9931393 is about 214.9496402693.

The spelling of 9931393 in words is "nine million, nine hundred thirty-one thousand, three hundred ninety-three".