409061843 has 4 divisors (see below), whose sum is σ = 410394600. Its totient is φ = 407729088.

The previous prime is 409061839. The next prime is 409061857. The reversal of 409061843 is 348160904.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 409061843 - 2² = 409061839 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (409061893) 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, 665918 + ... + 666531.

It is an arithmetic number, because the mean of its divisors is an integer number (102598650).

Almost surely, 2^409061843 is an apocalyptic number.

409061843 is a deficient number, since it is larger than the sum of its proper divisors (1332757).

409061843 is a wasteful number, since it uses less digits than its factorization.

409061843 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1332756.

The product of its (nonzero) digits is 20736, while the sum is 35.

The square root of 409061843 is about 20225.2773281357. The cubic root of 409061843 is about 742.3288229762.

It can be divided in two parts, 409061 and 843, that added together give a palindrome (409904).

The spelling of 409061843 in words is "four hundred nine million, sixty-one thousand, eight hundred forty-three".