9945539 has 2 divisors, whose sum is σ = 9945540. Its totient is φ = 9945538.

The previous prime is 9945511. The next prime is 9945553. The reversal of 9945539 is 9355499.

9945539 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 is an emirp because it is prime and its reverse (9355499) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-9945539 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 9945539.

It is not a weakly prime, because it can be changed into another prime (9945239) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4972769 + 4972770.

It is an arithmetic number, because the mean of its divisors is an integer number (4972770).

Almost surely, 2^9945539 is an apocalyptic number.

9945539 is a deficient number, since it is larger than the sum of its proper divisors (1).

9945539 is an equidigital number, since it uses as much as digits as its factorization.

9945539 is an evil number, because the sum of its binary digits is even.

The product of its digits is 218700, while the sum is 44.

The square root of 9945539 is about 3153.6548638049. The cubic root of 9945539 is about 215.0516479489.

The spelling of 9945539 in words is "nine million, nine hundred forty-five thousand, five hundred thirty-nine".