9939431 has 8 divisors (see below), whose sum is σ = 10400400. Its totient is φ = 9486400.

The previous prime is 9939403. The next prime is 9939463. The reversal of 9939431 is 1349399.

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 9939431 - 2¹⁰ = 9938407 is a prime.

It is a super-2 number, since 2×9939431² = 197584577207522, which contains 22 as substring.

It is an Ulam number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9939491) 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, 656 + ... + 4506.

It is an arithmetic number, because the mean of its divisors is an integer number (1300050).

Almost surely, 2^9939431 is an apocalyptic number.

9939431 is a deficient number, since it is larger than the sum of its proper divisors (460969).

9939431 is a wasteful number, since it uses less digits than its factorization.

9939431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3969.

The product of its digits is 26244, while the sum is 38.

The square root of 9939431 is about 3152.6863148750. The cubic root of 9939431 is about 215.0076146573.

The spelling of 9939431 in words is "nine million, nine hundred thirty-nine thousand, four hundred thirty-one".