9969975 has 36 divisors (see below), whose sum is σ = 18131776. Its totient is φ = 5235840.

The previous prime is 9969959. The next prime is 9970001. The reversal of 9969975 is 5799699.

It is not a de Polignac number, because 9969975 - 2⁴ = 9969959 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 16122 + ... + 16728.

Almost surely, 2^9969975 is an apocalyptic number.

9969975 is a deficient number, since it is larger than the sum of its proper divisors (8161801).

9969975 is a wasteful number, since it uses less digits than its factorization.

9969975 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 696 (or 688 counting only the distinct ones).

The product of its digits is 1377810, while the sum is 54.

The square root of 9969975 is about 3157.5267219772. The cubic root of 9969975 is about 215.2276298346.

The spelling of 9969975 in words is "nine million, nine hundred sixty-nine thousand, nine hundred seventy-five".