9749388457 has 2 divisors, whose sum is σ = 9749388458. Its totient is φ = 9749388456.

The previous prime is 9749388427. The next prime is 9749388469. The reversal of 9749388457 is 7548839479.

9749388457 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7060032576 + 2689355881 = 84024^2 + 51859^2 .

It is a cyclic number.

It is not a de Polignac number, because 9749388457 - 2⁷ = 9749388329 is a prime.

It is not a weakly prime, because it can be changed into another prime (9749388427) 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, 4874694228 + 4874694229.

It is an arithmetic number, because the mean of its divisors is an integer number (4874694229).

Almost surely, 2^9749388457 is an apocalyptic number.

It is an amenable number.

9749388457 is a deficient number, since it is larger than the sum of its proper divisors (1).

9749388457 is an equidigital number, since it uses as much as digits as its factorization.

9749388457 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 60963840, while the sum is 64.

The square root of 9749388457 is about 98738.9915737446. The cubic root of 9749388457 is about 2136.2846747098.

The spelling of 9749388457 in words is "nine billion, seven hundred forty-nine million, three hundred eighty-eight thousand, four hundred fifty-seven".