9732991 has 2 divisors, whose sum is σ = 9732992. Its totient is φ = 9732990.

The previous prime is 9732971. The next prime is 9733001. The reversal of 9732991 is 1992379.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-9732991 is a prime.

It is a super-2 number, since 2×9732991² = 189462227612162, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9732911) 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 as a sum of consecutive naturals, namely, 4866495 + 4866496.

It is an arithmetic number, because the mean of its divisors is an integer number (4866496).

Almost surely, 2^9732991 is an apocalyptic number.

9732991 is a deficient number, since it is larger than the sum of its proper divisors (1).

9732991 is an equidigital number, since it uses as much as digits as its factorization.

9732991 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 30618, while the sum is 40.

The square root of 9732991 is about 3119.7741905465. The cubic root of 9732991 is about 213.5086333113.

The spelling of 9732991 in words is "nine million, seven hundred thirty-two thousand, nine hundred ninety-one".