9742749649 has 2 divisors, whose sum is σ = 9742749650. Its totient is φ = 9742749648.

The previous prime is 9742749647. The next prime is 9742749697. The reversal of 9742749649 is 9469472479.

9742749649 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6561000000 + 3181749649 = 81000^2 + 56407^2 .

It is a cyclic number.

It is not a de Polignac number, because 9742749649 - 2¹ = 9742749647 is a prime.

Together with 9742749647, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (9742749641) 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, 4871374824 + 4871374825.

It is an arithmetic number, because the mean of its divisors is an integer number (4871374825).

Almost surely, 2^9742749649 is an apocalyptic number.

It is an amenable number.

9742749649 is a deficient number, since it is larger than the sum of its proper divisors (1).

9742749649 is an equidigital number, since it uses as much as digits as its factorization.

9742749649 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 27433728, while the sum is 61.

The square root of 9742749649 is about 98705.3678834135. The cubic root of 9742749649 is about 2135.7996663692.

The spelling of 9742749649 in words is "nine billion, seven hundred forty-two million, seven hundred forty-nine thousand, six hundred forty-nine".