9951911 has 2 divisors, whose sum is σ = 9951912. Its totient is φ = 9951910.

The previous prime is 9951883. The next prime is 9951913. The reversal of 9951911 is 1191599.

9951911 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 9951911 - 2¹⁸ = 9689767 is a prime.

Together with 9951913, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9951913) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4975955 + 4975956.

It is an arithmetic number, because the mean of its divisors is an integer number (4975956).

Almost surely, 2^9951911 is an apocalyptic number.

9951911 is a deficient number, since it is larger than the sum of its proper divisors (1).

9951911 is an equidigital number, since it uses as much as digits as its factorization.

9951911 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3645, while the sum is 35.

The square root of 9951911 is about 3154.6649584385. The cubic root of 9951911 is about 215.0975652377.

The spelling of 9951911 in words is "nine million, nine hundred fifty-one thousand, nine hundred eleven".