2004194639 has 2 divisors, whose sum is σ = 2004194640. Its totient is φ = 2004194638.

The previous prime is 2004194627. The next prime is 2004194653. The reversal of 2004194639 is 9364914002.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2004194639 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2004194939) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1002097319 + 1002097320.

It is an arithmetic number, because the mean of its divisors is an integer number (1002097320).

Almost surely, 2^2004194639 is an apocalyptic number.

2004194639 is a deficient number, since it is larger than the sum of its proper divisors (1).

2004194639 is an equidigital number, since it uses as much as digits as its factorization.

2004194639 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 46656, while the sum is 38.

The square root of 2004194639 is about 44768.2324757188. The cubic root of 2004194639 is about 1260.8012538206.

The spelling of 2004194639 in words is "two billion, four million, one hundred ninety-four thousand, six hundred thirty-nine".