9913081 has 2 divisors, whose sum is σ = 9913082. Its totient is φ = 9913080.

The previous prime is 9913051. The next prime is 9913093. The reversal of 9913081 is 1803199.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9765625 + 147456 = 3125^2 + 384^2 .

It is a cyclic number.

It is not a de Polignac number, because 9913081 - 2¹³ = 9904889 is a prime.

It is a super-2 number, since 2×9913081² = 196538349825122, which contains 22 as substring.

It is a Chen prime.

It is an Ulam number.

It is not a weakly prime, because it can be changed into another prime (9913051) 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, 4956540 + 4956541.

It is an arithmetic number, because the mean of its divisors is an integer number (4956541).

Almost surely, 2^9913081 is an apocalyptic number.

It is an amenable number.

9913081 is a deficient number, since it is larger than the sum of its proper divisors (1).

9913081 is an equidigital number, since it uses as much as digits as its factorization.

9913081 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1944, while the sum is 31.

The square root of 9913081 is about 3148.5045656629. The cubic root of 9913081 is about 214.8174473492.

The spelling of 9913081 in words is "nine million, nine hundred thirteen thousand, eighty-one".