9947539 has 6 divisors (see below), whose sum is σ = 11571684. Its totient is φ = 8526420.

The previous prime is 9947527. The next prime is 9947573. The reversal of 9947539 is 9357499.

It is not a de Polignac number, because 9947539 - 2¹⁹ = 9423251 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (9947599) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 101457 + ... + 101554.

It is an arithmetic number, because the mean of its divisors is an integer number (1928614).

Almost surely, 2^9947539 is an apocalyptic number.

9947539 is a deficient number, since it is larger than the sum of its proper divisors (1624145).

9947539 is a wasteful number, since it uses less digits than its factorization.

9947539 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 203025 (or 203018 counting only the distinct ones).

The product of its digits is 306180, while the sum is 46.

The square root of 9947539 is about 3153.9719402683. The cubic root of 9947539 is about 215.0660622664.

The spelling of 9947539 in words is "nine million, nine hundred forty-seven thousand, five hundred thirty-nine".