9945609 has 16 divisors (see below), whose sum is σ = 13716864. Its totient is φ = 6406400.

The previous prime is 9945587. The next prime is 9945619. The reversal of 9945609 is 9065499.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 9945609 - 2¹² = 9941513 is a prime.

It is not an unprimeable number, because it can be changed into a prime (9945619) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10849 + ... + 11729.

It is an arithmetic number, because the mean of its divisors is an integer number (857304).

Almost surely, 2^9945609 is an apocalyptic number.

It is an amenable number.

9945609 is a deficient number, since it is larger than the sum of its proper divisors (3771255).

9945609 is a wasteful number, since it uses less digits than its factorization.

9945609 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1008.

The product of its (nonzero) digits is 87480, while the sum is 42.

The square root of 9945609 is about 3153.6659620194. The cubic root of 9945609 is about 215.0521524827.

The spelling of 9945609 in words is "nine million, nine hundred forty-five thousand, six hundred nine".