9638139 has 8 divisors (see below), whose sum is σ = 14686720. Its totient is φ = 5507496.

The previous prime is 9638137. The next prime is 9638143. The reversal of 9638139 is 9318369.

9638139 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 not a de Polignac number, because 9638139 - 2¹ = 9638137 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 9638097 and 9638106.

It is not an unprimeable number, because it can be changed into a prime (9638137) 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, 229459 + ... + 229500.

It is an arithmetic number, because the mean of its divisors is an integer number (1835840).

Almost surely, 2^9638139 is an apocalyptic number.

9638139 is a deficient number, since it is larger than the sum of its proper divisors (5048581).

9638139 is a wasteful number, since it uses less digits than its factorization.

9638139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 458969.

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

The square root of 9638139 is about 3104.5352309162. The cubic root of 9638139 is about 212.8127914913.

The spelling of 9638139 in words is "nine million, six hundred thirty-eight thousand, one hundred thirty-nine".