9911975 has 6 divisors (see below), whose sum is σ = 12290880. Its totient is φ = 7929560.

The previous prime is 9911963. The next prime is 9911983. The reversal of 9911975 is 5791199.

It is a happy number.

It is not a de Polignac number, because 9911975 - 2⁴ = 9911959 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 198215 + ... + 198264.

It is an arithmetic number, because the mean of its divisors is an integer number (2048480).

Almost surely, 2^9911975 is an apocalyptic number.

9911975 is a deficient number, since it is larger than the sum of its proper divisors (2378905).

9911975 is a wasteful number, since it uses less digits than its factorization.

9911975 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 396489 (or 396484 counting only the distinct ones).

The product of its digits is 25515, while the sum is 41.

The square root of 9911975 is about 3148.3289218250. The cubic root of 9911975 is about 214.8094580089.

The spelling of 9911975 in words is "nine million, nine hundred eleven thousand, nine hundred seventy-five".