9638439 has 12 divisors (see below), whose sum is σ = 13652904. Its totient is φ = 6047104.

The previous prime is 9638437. The next prime is 9638441. The reversal of 9638439 is 9348369.

It is an interprime number because it is at equal distance from previous prime (9638437) and next prime (9638441).

It is not a de Polignac number, because 9638439 - 2¹ = 9638437 is a prime.

9638439 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 9638439.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9638437) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4692 + ... + 6425.

It is an arithmetic number, because the mean of its divisors is an integer number (1137742).

Almost surely, 2^9638439 is an apocalyptic number.

9638439 is a deficient number, since it is larger than the sum of its proper divisors (4014465).

9638439 is a wasteful number, since it uses less digits than its factorization.

9638439 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11154 (or 11137 counting only the distinct ones).

The product of its digits is 139968, while the sum is 42.

The square root of 9638439 is about 3104.5835469512. The cubic root of 9638439 is about 212.8149994963.

The spelling of 9638439 in words is "nine million, six hundred thirty-eight thousand, four hundred thirty-nine".