843985745 has 8 divisors (see below), whose sum is σ = 1014291816. Its totient is φ = 674182656.

The previous prime is 843985717. The next prime is 843985771. The reversal of 843985745 is 547589348.

It can be written as a sum of positive squares in 4 ways, for example, as 208542481 + 635443264 = 14441^2 + 25208^2 .

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 843985745 - 2⁸ = 843985489 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 122042 + ... + 128771.

It is an arithmetic number, because the mean of its divisors is an integer number (126786477).

Almost surely, 2^843985745 is an apocalyptic number.

It is an amenable number.

843985745 is a deficient number, since it is larger than the sum of its proper divisors (170306071).

843985745 is a wasteful number, since it uses less digits than its factorization.

843985745 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 251491.

The product of its digits is 4838400, while the sum is 53.

The square root of 843985745 is about 29051.4327529642. The cubic root of 843985745 is about 945.0287851781.

The spelling of 843985745 in words is "eight hundred forty-three million, nine hundred eighty-five thousand, seven hundred forty-five".