9913889 has 2 divisors, whose sum is σ = 9913890. Its totient is φ = 9913888.

The previous prime is 9913879. The next prime is 9913901. The reversal of 9913889 is 9883199.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 9859600 + 54289 = 3140^2 + 233^2 .

It is a cyclic number.

It is not a de Polignac number, because 9913889 - 2¹⁶ = 9848353 is a prime.

It is not a weakly prime, because it can be changed into another prime (9913879) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4956944 + 4956945.

It is an arithmetic number, because the mean of its divisors is an integer number (4956945).

Almost surely, 2^9913889 is an apocalyptic number.

It is an amenable number.

9913889 is a deficient number, since it is larger than the sum of its proper divisors (1).

9913889 is an equidigital number, since it uses as much as digits as its factorization.

9913889 is an evil number, because the sum of its binary digits is even.

The product of its digits is 139968, while the sum is 47.

The square root of 9913889 is about 3148.6328779329. The cubic root of 9913889 is about 214.8232836707.

The spelling of 9913889 in words is "nine million, nine hundred thirteen thousand, eight hundred eighty-nine".