9975905 has 16 divisors (see below), whose sum is σ = 12579840. Its totient is φ = 7579968.

The previous prime is 9975899. The next prime is 9975943. The reversal of 9975905 is 5095799.

It is a cyclic number.

It is not a de Polignac number, because 9975905 - 2⁶ = 9975841 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 25451 + ... + 25839.

It is an arithmetic number, because the mean of its divisors is an integer number (786240).

Almost surely, 2^9975905 is an apocalyptic number.

It is an amenable number.

9975905 is a deficient number, since it is larger than the sum of its proper divisors (2603935).

9975905 is a wasteful number, since it uses less digits than its factorization.

9975905 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 640.

The product of its (nonzero) digits is 127575, while the sum is 44.

The square root of 9975905 is about 3158.4656084878. The cubic root of 9975905 is about 215.2702928264.

The spelling of 9975905 in words is "nine million, nine hundred seventy-five thousand, nine hundred five".