843404609 has 4 divisors (see below), whose sum is σ = 848455104. Its totient is φ = 838354116.

The previous prime is 843404591. The next prime is 843404657. The reversal of 843404609 is 906404348.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 843404609 - 2¹² = 843400513 is a prime.

It is a super-2 number, since 2×843404609² = 1422662668964885762, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (843404659) 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, 2524997 + ... + 2525330.

It is an arithmetic number, because the mean of its divisors is an integer number (212113776).

Almost surely, 2^843404609 is an apocalyptic number.

It is an amenable number.

843404609 is a deficient number, since it is larger than the sum of its proper divisors (5050495).

843404609 is a wasteful number, since it uses less digits than its factorization.

843404609 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5050494.

The product of its (nonzero) digits is 82944, while the sum is 38.

The square root of 843404609 is about 29041.4291831514. The cubic root of 843404609 is about 944.8118319297.

The spelling of 843404609 in words is "eight hundred forty-three million, four hundred four thousand, six hundred nine".