409536169 has 21 divisors (see below), whose sum is σ = 486027037. Its totient is φ = 345081324.

The previous prime is 409536161. The next prime is 409536181. The reversal of 409536169 is 961635904.

The square root of 409536169 is 20237.

It is a perfect power (a square), and thus also a powerful number.

It is not a de Polignac number, because 409536169 - 2³ = 409536161 is a prime.

It is a super-2 number, since 2×409536169² = 335439747438393122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (409536161) by changing a digit.

It is a polite number, since it can be written in 20 ways as a sum of consecutive naturals, for example, 6941262 + ... + 6941320.

Almost surely, 2^409536169 is an apocalyptic number.

409536169 is a gapful number since it is divisible by the number (49) formed by its first and last digit.

409536169 is the 20237-th square number.

409536169 is the 10119-th centered octagonal number.

It is an amenable number.

409536169 is a deficient number, since it is larger than the sum of its proper divisors (76490868).

409536169 is an frugal number, since it uses more digits than its factorization.

409536169 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 160 (or 66 counting only the distinct ones).

The product of its (nonzero) digits is 174960, while the sum is 43.

The cubic root of 409536169 is about 742.6156336061.

The spelling of 409536169 in words is "four hundred nine million, five hundred thirty-six thousand, one hundred sixty-nine".