9539009947 has 2 divisors, whose sum is σ = 9539009948. Its totient is φ = 9539009946.

The previous prime is 9539009929. The next prime is 9539009957. The reversal of 9539009947 is 7499009359.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-9539009947 is a prime.

It is not a weakly prime, because it can be changed into another prime (9539009957) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4769504973 + 4769504974.

It is an arithmetic number, because the mean of its divisors is an integer number (4769504974).

Almost surely, 2^9539009947 is an apocalyptic number.

9539009947 is a deficient number, since it is larger than the sum of its proper divisors (1).

9539009947 is an equidigital number, since it uses as much as digits as its factorization.

9539009947 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2755620, while the sum is 55.

The square root of 9539009947 is about 97667.8552390703. The cubic root of 9539009947 is about 2120.8067674527.

The spelling of 9539009947 in words is "nine billion, five hundred thirty-nine million, nine thousand, nine hundred forty-seven".