9989739 has 12 divisors (see below), whose sum is σ = 14579656. Its totient is φ = 6590592.

The previous prime is 9989737. The next prime is 9989747. The reversal of 9989739 is 9379899.

It is a happy number.

It is not a de Polignac number, because 9989739 - 2¹ = 9989737 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 (9989737) 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 11 ways as a sum of consecutive naturals, for example, 4849 + ... + 6594.

Almost surely, 2^9989739 is an apocalyptic number.

9989739 is a deficient number, since it is larger than the sum of its proper divisors (4589917).

9989739 is a wasteful number, since it uses less digits than its factorization.

9989739 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11546 (or 11543 counting only the distinct ones).

The product of its digits is 1102248, while the sum is 54.

The square root of 9989739 is about 3160.6548372133. The cubic root of 9989739 is about 215.3697549369.

It can be divided in two parts, 99897 and 39, that multiplied together give a palindrome (3895983).

The spelling of 9989739 in words is "nine million, nine hundred eighty-nine thousand, seven hundred thirty-nine".