9665915 has 16 divisors (see below), whose sum is σ = 13317312. Its totient is φ = 6597504.

The previous prime is 9665891. The next prime is 9665923. The reversal of 9665915 is 5195669.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-9665915 is a prime.

It is a Duffinian number.

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, 9197 + ... + 10193.

It is an arithmetic number, because the mean of its divisors is an integer number (832332).

Almost surely, 2^9665915 is an apocalyptic number.

9665915 is a deficient number, since it is larger than the sum of its proper divisors (3651397).

9665915 is a wasteful number, since it uses less digits than its factorization.

9665915 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1286.

The product of its digits is 72900, while the sum is 41.

The square root of 9665915 is about 3109.0054679913. The cubic root of 9665915 is about 213.0170293569.

It can be divided in two parts, 966 and 5915, that multiplied together give a triangular number (5713890 = T₃₃₈₀).

The spelling of 9665915 in words is "nine million, six hundred sixty-five thousand, nine hundred fifteen".