9538740209 has 2 divisors, whose sum is σ = 9538740210. Its totient is φ = 9538740208.

The previous prime is 9538740161. The next prime is 9538740247. The reversal of 9538740209 is 9020478359.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 8992349584 + 546390625 = 94828^2 + 23375^2 .

It is a cyclic number.

It is not a de Polignac number, because 9538740209 - 2⁸ = 9538739953 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (9538740509) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4769370104 + 4769370105.

It is an arithmetic number, because the mean of its divisors is an integer number (4769370105).

Almost surely, 2^9538740209 is an apocalyptic number.

It is an amenable number.

9538740209 is a deficient number, since it is larger than the sum of its proper divisors (1).

9538740209 is an equidigital number, since it uses as much as digits as its factorization.

9538740209 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 544320, while the sum is 47.

The square root of 9538740209 is about 97666.4743348504. The cubic root of 9538740209 is about 2120.7867769935.

The spelling of 9538740209 in words is "nine billion, five hundred thirty-eight million, seven hundred forty thousand, two hundred nine".