9881389 has 6 divisors (see below), whose sum is σ = 11494734. Its totient is φ = 8469720.

The previous prime is 9881381. The next prime is 9881401. The reversal of 9881389 is 9831889.

It can be written as a sum of positive squares in only one way, i.e., 8037225 + 1844164 = 2835^2 + 1358^2 .

It is not a de Polignac number, because 9881389 - 2³ = 9881381 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9881381) 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 in 5 ways as a sum of consecutive naturals, for example, 100782 + ... + 100879.

It is an arithmetic number, because the mean of its divisors is an integer number (1915789).

Almost surely, 2^9881389 is an apocalyptic number.

It is an amenable number.

9881389 is a deficient number, since it is larger than the sum of its proper divisors (1613345).

9881389 is a wasteful number, since it uses less digits than its factorization.

9881389 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 201675 (or 201668 counting only the distinct ones).

The product of its digits is 124416, while the sum is 46.

The square root of 9881389 is about 3143.4676712192. The cubic root of 9881389 is about 214.5882800338.

The spelling of 9881389 in words is "nine million, eight hundred eighty-one thousand, three hundred eighty-nine".