9996557 has 2 divisors, whose sum is σ = 9996558. Its totient is φ = 9996556.

The previous prime is 9996541. The next prime is 9996583. The reversal of 9996557 is 7556999.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 9947716 + 48841 = 3154^2 + 221^2 .

It is an emirp because it is prime and its reverse (7556999) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 9996557 - 2⁴ = 9996541 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9996517) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4998278 + 4998279.

It is an arithmetic number, because the mean of its divisors is an integer number (4998279).

Almost surely, 2^9996557 is an apocalyptic number.

It is an amenable number.

9996557 is a deficient number, since it is larger than the sum of its proper divisors (1).

9996557 is an equidigital number, since it uses as much as digits as its factorization.

9996557 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 765450, while the sum is 50.

The square root of 9996557 is about 3161.7332272031. The cubic root of 9996557 is about 215.4187404362.

The spelling of 9996557 in words is "nine million, nine hundred ninety-six thousand, five hundred fifty-seven".