9947557537 has 2 divisors, whose sum is σ = 9947557538. Its totient is φ = 9947557536.

The previous prime is 9947557517. The next prime is 9947557541. The reversal of 9947557537 is 7357557499.

It is a happy number.

9947557537 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., 9580298641 + 367258896 = 97879^2 + 19164^2 .

It is an emirp because it is prime and its reverse (7357557499) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 9947557537 - 2¹¹ = 9947555489 is a prime.

It is not a weakly prime, because it can be changed into another prime (9947557517) 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, 4973778768 + 4973778769.

It is an arithmetic number, because the mean of its divisors is an integer number (4973778769).

Almost surely, 2^9947557537 is an apocalyptic number.

It is an amenable number.

9947557537 is a deficient number, since it is larger than the sum of its proper divisors (1).

9947557537 is an equidigital number, since it uses as much as digits as its factorization.

9947557537 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 41674500, while the sum is 61.

The square root of 9947557537 is about 99737.4430041196. The cubic root of 9947557537 is about 2150.6619585643.

The spelling of 9947557537 in words is "nine billion, nine hundred forty-seven million, five hundred fifty-seven thousand, five hundred thirty-seven".