9923911 has 2 divisors, whose sum is σ = 9923912. Its totient is φ = 9923910.

The previous prime is 9923899. The next prime is 9923923. The reversal of 9923911 is 1193299.

It is a balanced prime because it is at equal distance from previous prime (9923899) and next prime (9923923).

It is an emirp because it is prime and its reverse (1193299) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 9923911 - 2⁷ = 9923783 is a prime.

9923911 is a lucky number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9923941) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4961955 + 4961956.

It is an arithmetic number, because the mean of its divisors is an integer number (4961956).

Almost surely, 2^9923911 is an apocalyptic number.

9923911 is a deficient number, since it is larger than the sum of its proper divisors (1).

9923911 is an equidigital number, since it uses as much as digits as its factorization.

9923911 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4374, while the sum is 34.

The square root of 9923911 is about 3150.2239602923. The cubic root of 9923911 is about 214.8956479358.

The spelling of 9923911 in words is "nine million, nine hundred twenty-three thousand, nine hundred eleven".