9911959 has 2 divisors, whose sum is σ = 9911960. Its totient is φ = 9911958.

The previous prime is 9911953. The next prime is 9911963. The reversal of 9911959 is 9591199.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 9911959 - 2⁷ = 9911831 is a prime.

9911959 is a lucky number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9911953) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4955979 + 4955980.

It is an arithmetic number, because the mean of its divisors is an integer number (4955980).

Almost surely, 2^9911959 is an apocalyptic number.

9911959 is a deficient number, since it is larger than the sum of its proper divisors (1).

9911959 is an equidigital number, since it uses as much as digits as its factorization.

9911959 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 32805, while the sum is 43.

The square root of 9911959 is about 3148.3263807935. The cubic root of 9911959 is about 214.8093424264.

The spelling of 9911959 in words is "nine million, nine hundred eleven thousand, nine hundred fifty-nine".