9879557 has 2 divisors, whose sum is σ = 9879558. Its totient is φ = 9879556.

The previous prime is 9879521. The next prime is 9879577. The reversal of 9879557 is 7559789.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 5013121 + 4866436 = 2239^2 + 2206^2 .

It is an emirp because it is prime and its reverse (7559789) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-9879557 is a prime.

It is a Chen prime.

It is an Ulam number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9879577) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4939778 + 4939779.

It is an arithmetic number, because the mean of its divisors is an integer number (4939779).

Almost surely, 2^9879557 is an apocalyptic number.

It is an amenable number.

9879557 is a deficient number, since it is larger than the sum of its proper divisors (1).

9879557 is an equidigital number, since it uses as much as digits as its factorization.

9879557 is an evil number, because the sum of its binary digits is even.

The product of its digits is 793800, while the sum is 50.

The square root of 9879557 is about 3143.1762597729. The cubic root of 9879557 is about 214.5750177274.

The spelling of 9879557 in words is "nine million, eight hundred seventy-nine thousand, five hundred fifty-seven".