9945509 has 8 divisors (see below), whose sum is σ = 11387328. Its totient is φ = 8508960.

The previous prime is 9945461. The next prime is 9945511. The reversal of 9945509 is 9055499.

9945509 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 9945509 - 2⁸ = 9945253 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9945539) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4394 + ... + 6260.

It is an arithmetic number, because the mean of its divisors is an integer number (1423416).

Almost surely, 2^9945509 is an apocalyptic number.

It is an amenable number.

9945509 is a deficient number, since it is larger than the sum of its proper divisors (1441819).

9945509 is a wasteful number, since it uses less digits than its factorization.

9945509 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2635.

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

The square root of 9945509 is about 3153.6501074152. The cubic root of 9945509 is about 215.0514317195.

The spelling of 9945509 in words is "nine million, nine hundred forty-five thousand, five hundred nine".