1004004439 has 4 divisors (see below), whose sum is σ = 1004259256. Its totient is φ = 1003749624.

The previous prime is 1004004431. The next prime is 1004004451. The reversal of 1004004439 is 9344004001.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9344004001 = 89 ⋅104988809.

It is a cyclic number.

It is not a de Polignac number, because 1004004439 - 2³ = 1004004431 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 (1004004431) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 121404 + ... + 129409.

It is an arithmetic number, because the mean of its divisors is an integer number (251064814).

Almost surely, 2^1004004439 is an apocalyptic number.

1004004439 is a deficient number, since it is larger than the sum of its proper divisors (254817).

1004004439 is an equidigital number, since it uses as much as digits as its factorization.

1004004439 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 254816.

The product of its (nonzero) digits is 1728, while the sum is 25.

The square root of 1004004439 is about 31686.0290822312. The cubic root of 1004004439 is about 1001.3330352275. Note that the first 3 decimals are identical.

The spelling of 1004004439 in words is "one billion, four million, four thousand, four hundred thirty-nine".