9903557 has 2 divisors, whose sum is σ = 9903558. Its totient is φ = 9903556.

The previous prime is 9903499. The next prime is 9903559. The reversal of 9903557 is 7553099.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9897316 + 6241 = 3146^2 + 79^2 .

It is a cyclic number.

It is not a de Polignac number, because 9903557 - 2⁶ = 9903493 is a prime.

Together with 9903559, it forms a pair of twin primes.

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 9903557.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9903559) 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 as a sum of consecutive naturals, namely, 4951778 + 4951779.

It is an arithmetic number, because the mean of its divisors is an integer number (4951779).

Almost surely, 2^9903557 is an apocalyptic number.

It is an amenable number.

9903557 is a deficient number, since it is larger than the sum of its proper divisors (1).

9903557 is an equidigital number, since it uses as much as digits as its factorization.

9903557 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 42525, while the sum is 38.

The square root of 9903557 is about 3146.9917381525. The cubic root of 9903557 is about 214.7486299646.

The spelling of 9903557 in words is "nine million, nine hundred three thousand, five hundred fifty-seven".