1605433243 has 8 divisors (see below), whose sum is σ = 1676317680. Its totient is φ = 1535583840.

The previous prime is 1605433241. The next prime is 1605433259. The reversal of 1605433243 is 3423345061.

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 1605433243 - 2¹ = 1605433241 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1605433241) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 255588 + ... + 261793.

It is an arithmetic number, because the mean of its divisors is an integer number (209539710).

Almost surely, 2^1605433243 is an apocalyptic number.

1605433243 is a deficient number, since it is larger than the sum of its proper divisors (70884437).

1605433243 is a wasteful number, since it uses less digits than its factorization.

1605433243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 517517.

The product of its (nonzero) digits is 25920, while the sum is 31.

The square root of 1605433243 is about 40067.8579786841. The cubic root of 1605433243 is about 1170.9295077825.

The spelling of 1605433243 in words is "one billion, six hundred five million, four hundred thirty-three thousand, two hundred forty-three".