9404139 has 4 divisors (see below), whose sum is σ = 12538856. Its totient is φ = 6269424.

The previous prime is 9404119. The next prime is 9404141. The reversal of 9404139 is 9314049.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9314049 = 3 ⋅3104683.

It is not a de Polignac number, because 9404139 - 2⁷ = 9404011 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (9404119) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1567354 + ... + 1567359.

It is an arithmetic number, because the mean of its divisors is an integer number (3134714).

Almost surely, 2^9404139 is an apocalyptic number.

9404139 is a deficient number, since it is larger than the sum of its proper divisors (3134717).

9404139 is a wasteful number, since it uses less digits than its factorization.

9404139 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3134716.

The product of its (nonzero) digits is 3888, while the sum is 30.

The square root of 9404139 is about 3066.6168655377. The cubic root of 9404139 is about 211.0764006850.

The spelling of 9404139 in words is "nine million, four hundred four thousand, one hundred thirty-nine".