9742749889 has 2 divisors, whose sum is σ = 9742749890. Its totient is φ = 9742749888.

The previous prime is 9742749713. The next prime is 9742749893. The reversal of 9742749889 is 9889472479.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9690433600 + 52316289 = 98440^2 + 7233^2 .

It is an emirp because it is prime and its reverse (9889472479) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 9742749889 - 2¹⁵ = 9742717121 is a prime.

It is not a weakly prime, because it can be changed into another prime (9742749089) 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, 4871374944 + 4871374945.

It is an arithmetic number, because the mean of its divisors is an integer number (4871374945).

Almost surely, 2^9742749889 is an apocalyptic number.

It is an amenable number.

9742749889 is a deficient number, since it is larger than the sum of its proper divisors (1).

9742749889 is an equidigital number, since it uses as much as digits as its factorization.

9742749889 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 73156608, while the sum is 67.

The square root of 9742749889 is about 98705.3690991529. The cubic root of 9742749889 is about 2135.7996839067.

The spelling of 9742749889 in words is "nine billion, seven hundred forty-two million, seven hundred forty-nine thousand, eight hundred eighty-nine".