9984139 has 32 divisors (see below), whose sum is σ = 12533760. Its totient is φ = 7840800.

The previous prime is 9984133. The next prime is 9984167. The reversal of 9984139 is 9314899.

It is not a de Polignac number, because 9984139 - 2³ = 9984131 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 9984095 and 9984104.

It is not an unprimeable number, because it can be changed into a prime (9984131) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 148984 + ... + 149050.

It is an arithmetic number, because the mean of its divisors is an integer number (391680).

Almost surely, 2^9984139 is an apocalyptic number.

9984139 is a deficient number, since it is larger than the sum of its proper divisors (2549621).

9984139 is a wasteful number, since it uses less digits than its factorization.

9984139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 151.

The product of its digits is 69984, while the sum is 43.

The square root of 9984139 is about 3159.7688206576. The cubic root of 9984139 is about 215.3295037665.

The spelling of 9984139 in words is "nine million, nine hundred eighty-four thousand, one hundred thirty-nine".