9909734491 has 2 divisors, whose sum is σ = 9909734492. Its totient is φ = 9909734490.

The previous prime is 9909734489. The next prime is 9909734501. The reversal of 9909734491 is 1944379099.

9909734491 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 9909734491 - 2¹ = 9909734489 is a prime.

Together with 9909734489, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (9909734591) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4954867245 + 4954867246.

It is an arithmetic number, because the mean of its divisors is an integer number (4954867246).

Almost surely, 2^9909734491 is an apocalyptic number.

9909734491 is a deficient number, since it is larger than the sum of its proper divisors (1).

9909734491 is an equidigital number, since it uses as much as digits as its factorization.

9909734491 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2204496, while the sum is 55.

The square root of 9909734491 is about 99547.6493494447. The cubic root of 9909734491 is about 2147.9327156805.

The spelling of 9909734491 in words is "nine billion, nine hundred nine million, seven hundred thirty-four thousand, four hundred ninety-one".