1605843049 has 8 divisors (see below), whose sum is σ = 1681388352. Its totient is φ = 1530774960.

The previous prime is 1605842999. The next prime is 1605843077. The reversal of 1605843049 is 9403485061.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1605843049 - 2⁷ = 1605842921 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1605843079) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 112407 + ... + 125884.

It is an arithmetic number, because the mean of its divisors is an integer number (210173544).

Almost surely, 2^1605843049 is an apocalyptic number.

It is an amenable number.

1605843049 is a deficient number, since it is larger than the sum of its proper divisors (75545303).

1605843049 is a wasteful number, since it uses less digits than its factorization.

1605843049 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 238607.

The product of its (nonzero) digits is 103680, while the sum is 40.

The square root of 1605843049 is about 40072.9715519077. The cubic root of 1605843049 is about 1171.0291305513.

The spelling of 1605843049 in words is "one billion, six hundred five million, eight hundred forty-three thousand, forty-nine".