9975915 has 24 divisors (see below), whose sum is σ = 17716608. Its totient is φ = 5189760.

The previous prime is 9975899. The next prime is 9975943. The reversal of 9975915 is 5195799.

It is not a de Polignac number, because 9975915 - 2⁴ = 9975899 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 859 + ... + 4548.

It is an arithmetic number, because the mean of its divisors is an integer number (738192).

Almost surely, 2^9975915 is an apocalyptic number.

9975915 is a deficient number, since it is larger than the sum of its proper divisors (7740693).

9975915 is a wasteful number, since it uses less digits than its factorization.

9975915 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5459 (or 5456 counting only the distinct ones).

The product of its digits is 127575, while the sum is 45.

The square root of 9975915 is about 3158.4671915345. The cubic root of 9975915 is about 215.2703647565.

The spelling of 9975915 in words is "nine million, nine hundred seventy-five thousand, nine hundred fifteen".