9681431 has 4 divisors (see below), whose sum is σ = 10191000. Its totient is φ = 9171864.

The previous prime is 9681421. The next prime is 9681437. The reversal of 9681431 is 1341869.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-9681431 is a prime.

It is a super-2 number, since 2×9681431² = 187460212415522, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9681437) 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, 254756 + ... + 254793.

It is an arithmetic number, because the mean of its divisors is an integer number (2547750).

Almost surely, 2^9681431 is an apocalyptic number.

9681431 is a deficient number, since it is larger than the sum of its proper divisors (509569).

9681431 is a wasteful number, since it uses less digits than its factorization.

9681431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 509568.

The product of its digits is 5184, while the sum is 32.

The square root of 9681431 is about 3111.4997991322. The cubic root of 9681431 is about 213.1309487422.

The spelling of 9681431 in words is "nine million, six hundred eighty-one thousand, four hundred thirty-one".