9972609 has 4 divisors (see below), whose sum is σ = 13296816. Its totient is φ = 6648404.

The previous prime is 9972583. The next prime is 9972617. The reversal of 9972609 is 9062799.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 9972609 - 2⁵ = 9972577 is a prime.

9972609 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (9972649) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1662099 + ... + 1662104.

It is an arithmetic number, because the mean of its divisors is an integer number (3324204).

Almost surely, 2^9972609 is an apocalyptic number.

It is an amenable number.

9972609 is a deficient number, since it is larger than the sum of its proper divisors (3324207).

9972609 is a wasteful number, since it uses less digits than its factorization.

9972609 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3324206.

The product of its (nonzero) digits is 61236, while the sum is 42.

The square root of 9972609 is about 3157.9437930400. The cubic root of 9972609 is about 215.2465820606.

The spelling of 9972609 in words is "nine million, nine hundred seventy-two thousand, six hundred nine".