409581243 has 6 divisors (see below), whose sum is σ = 591617364. Its totient is φ = 273054156.

The previous prime is 409581199. The next prime is 409581247. The reversal of 409581243 is 342185904.

409581243 is a `hidden beast` number, since 409 + 5 + 8 + 1 + 243 = 666.

It is not a de Polignac number, because 409581243 - 2²⁵ = 376026811 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 409581198 and 409581207.

It is not an unprimeable number, because it can be changed into a prime (409581247) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 22754505 + ... + 22754522.

It is an arithmetic number, because the mean of its divisors is an integer number (98602894).

Almost surely, 2^409581243 is an apocalyptic number.

409581243 is a deficient number, since it is larger than the sum of its proper divisors (182036121).

409581243 is a wasteful number, since it uses less digits than its factorization.

409581243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45509033 (or 45509030 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 36.

The square root of 409581243 is about 20238.1136225687. The cubic root of 409581243 is about 742.6428769704.

The spelling of 409581243 in words is "four hundred nine million, five hundred eighty-one thousand, two hundred forty-three".