9642939 has 4 divisors (see below), whose sum is σ = 12857256. Its totient is φ = 6428624.

The previous prime is 9642931. The next prime is 9642949. The reversal of 9642939 is 9392469.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9392469 = 3 ⋅3130823.

It is a cyclic number.

It is not a de Polignac number, because 9642939 - 2³ = 9642931 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 9642939.

It is not an unprimeable number, because it can be changed into a prime (9642931) 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, 1607154 + ... + 1607159.

It is an arithmetic number, because the mean of its divisors is an integer number (3214314).

Almost surely, 2^9642939 is an apocalyptic number.

9642939 is a deficient number, since it is larger than the sum of its proper divisors (3214317).

9642939 is a wasteful number, since it uses less digits than its factorization.

9642939 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3214316.

The product of its digits is 104976, while the sum is 42.

The square root of 9642939 is about 3105.3081972648. The cubic root of 9642939 is about 212.8481140735.

The spelling of 9642939 in words is "nine million, six hundred forty-two thousand, nine hundred thirty-nine".