409024081 has 4 divisors (see below), whose sum is σ = 409227700. Its totient is φ = 408820464.

The previous prime is 409024067. The next prime is 409024087. The reversal of 409024081 is 180420904.

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

It can be written as a sum of positive squares in 2 ways, for example, as 327031056 + 81993025 = 18084^2 + 9055^2 .

It is a cyclic number.

It is not a de Polignac number, because 409024081 - 2²¹ = 406926929 is a prime.

It is a super-2 number, since 2×409024081² = 334601397675789122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (409024087) 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, 98766 + ... + 102823.

It is an arithmetic number, because the mean of its divisors is an integer number (102306925).

Almost surely, 2^409024081 is an apocalyptic number.

It is an amenable number.

409024081 is a deficient number, since it is larger than the sum of its proper divisors (203619).

409024081 is a wasteful number, since it uses less digits than its factorization.

409024081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 203618.

The product of its (nonzero) digits is 2304, while the sum is 28.

The square root of 409024081 is about 20224.3437718013. The cubic root of 409024081 is about 742.3059799073.

Adding to 409024081 its reverse (180420904), we get a palindrome (589444985).

The spelling of 409024081 in words is "four hundred nine million, twenty-four thousand, eighty-one".