9969731 has 2 divisors, whose sum is σ = 9969732. Its totient is φ = 9969730.

The previous prime is 9969719. The next prime is 9969793. The reversal of 9969731 is 1379699.

It is a happy number.

It is a weak prime.

It is an emirp because it is prime and its reverse (1379699) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-9969731 is a prime.

It is a super-2 number, since 2×9969731² = 198791072424722, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (9969331) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4984865 + 4984866.

It is an arithmetic number, because the mean of its divisors is an integer number (4984866).

Almost surely, 2^9969731 is an apocalyptic number.

9969731 is a deficient number, since it is larger than the sum of its proper divisors (1).

9969731 is an equidigital number, since it uses as much as digits as its factorization.

9969731 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 91854, while the sum is 44.

The square root of 9969731 is about 3157.4880839047. The cubic root of 9969731 is about 215.2258740304.

The spelling of 9969731 in words is "nine million, nine hundred sixty-nine thousand, seven hundred thirty-one".