409381 has 8 divisors (see below), whose sum is σ = 471744. Its totient is φ = 348000.

The previous prime is 409379. The next prime is 409391. The reversal of 409381 is 183904.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 409381 - 2¹ = 409379 is a prime.

It is a super-2 number, since 2×409381² = 335185606322, which contains 22 as substring.

It is a plaindrome in base 13.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (409351) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1506 + ... + 1756.

It is an arithmetic number, because the mean of its divisors is an integer number (58968).

2⁴⁰⁹³⁸¹ is an apocalyptic number.

It is an amenable number.

409381 is a deficient number, since it is larger than the sum of its proper divisors (62363).

409381 is a wasteful number, since it uses less digits than its factorization.

409381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 491.

The product of its (nonzero) digits is 864, while the sum is 25.

The square root of 409381 is about 639.8288833743. The cubic root of 409381 is about 74.2521831975.

The spelling of 409381 in words is "four hundred nine thousand, three hundred eighty-one".