9968557 has 4 divisors (see below), whose sum is σ = 9993340. Its totient is φ = 9943776.

The previous prime is 9968551. The next prime is 9968573. The reversal of 9968557 is 7558699.

9968557 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7558699 = 31 ⋅243829.

It can be written as a sum of positive squares in 2 ways, for example, as 6456681 + 3511876 = 2541^2 + 1874^2 .

It is a cyclic number.

It is not a de Polignac number, because 9968557 - 2¹⁵ = 9935789 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 9968557.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9968551) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11778 + ... + 12595.

It is an arithmetic number, because the mean of its divisors is an integer number (2498335).

Almost surely, 2^9968557 is an apocalyptic number.

It is an amenable number.

9968557 is a deficient number, since it is larger than the sum of its proper divisors (24783).

9968557 is a wasteful number, since it uses less digits than its factorization.

9968557 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24782.

The product of its digits is 680400, while the sum is 49.

The square root of 9968557 is about 3157.3021711582. The cubic root of 9968557 is about 215.2174256215.

The spelling of 9968557 in words is "nine million, nine hundred sixty-eight thousand, five hundred fifty-seven".