9959548813 has 2 divisors, whose sum is σ = 9959548814. Its totient is φ = 9959548812.

The previous prime is 9959548681. The next prime is 9959548829. The reversal of 9959548813 is 3188459599.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7354263049 + 2605285764 = 85757^2 + 51042^2 .

It is a cyclic number.

It is not a de Polignac number, because 9959548813 - 2²¹ = 9957451661 is a prime.

It is a super-2 number, since 2×9959548813² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9959548843) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4979774406 + 4979774407.

It is an arithmetic number, because the mean of its divisors is an integer number (4979774407).

Almost surely, 2^9959548813 is an apocalyptic number.

It is an amenable number.

9959548813 is a deficient number, since it is larger than the sum of its proper divisors (1).

9959548813 is an equidigital number, since it uses as much as digits as its factorization.

9959548813 is an evil number, because the sum of its binary digits is even.

The product of its digits is 13996800, while the sum is 61.

The square root of 9959548813 is about 99797.5391129461. The cubic root of 9959548813 is about 2151.5257828565.

The spelling of 9959548813 in words is "nine billion, nine hundred fifty-nine million, five hundred forty-eight thousand, eight hundred thirteen".