9942609 has 4 divisors (see below), whose sum is σ = 13256816. Its totient is φ = 6628404.

The previous prime is 9942607. The next prime is 9942617. The reversal of 9942609 is 9062499.

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, and also an emirpimes, since its reverse is a distinct semiprime: 9062499 = 3 ⋅3020833.

It is not a de Polignac number, because 9942609 - 2¹ = 9942607 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (9942607) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1657099 + ... + 1657104.

It is an arithmetic number, because the mean of its divisors is an integer number (3314204).

Almost surely, 2^9942609 is an apocalyptic number.

It is an amenable number.

9942609 is a deficient number, since it is larger than the sum of its proper divisors (3314207).

9942609 is a wasteful number, since it uses less digits than its factorization.

9942609 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3314206.

The product of its (nonzero) digits is 34992, while the sum is 39.

The square root of 9942609 is about 3153.1902892150. The cubic root of 9942609 is about 215.0305274843.

The spelling of 9942609 in words is "nine million, nine hundred forty-two thousand, six hundred nine".