10009931 has 4 divisors (see below), whose sum is σ = 10332864. Its totient is φ = 9687000.

The previous prime is 10009921. The next prime is 10009933. The reversal of 10009931 is 13990001.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 10009931 - 2²² = 5815627 is a prime.

It is a super-2 number, since 2×10009931² = 200397437249522, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 10009897 and 10009906.

It is not an unprimeable number, because it can be changed into a prime (10009933) 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, 161420 + ... + 161481.

It is an arithmetic number, because the mean of its divisors is an integer number (2583216).

Almost surely, 2^10009931 is an apocalyptic number.

10009931 is a deficient number, since it is larger than the sum of its proper divisors (322933).

10009931 is an equidigital number, since it uses as much as digits as its factorization.

10009931 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 322932.

The product of its (nonzero) digits is 243, while the sum is 23.

The square root of 10009931 is about 3163.8474994854. The cubic root of 10009931 is about 215.5147643769.

Adding to 10009931 its reverse (13990001), we get a palindrome (23999932).

The spelling of 10009931 in words is "ten million, nine thousand, nine hundred thirty-one".