409403 has 4 divisors (see below), whose sum is σ = 418968. Its totient is φ = 399840.

The previous prime is 409397. The next prime is 409429. The reversal of 409403 is 304904.

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 409403 - 2¹⁰ = 408379 is a prime.

It is a super-2 number, since 2×409403² = 335221632818, which contains 22 as substring.

It is a Duffinian number.

It is a plaindrome in base 13.

It is not an unprimeable number, because it can be changed into a prime (409433) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4718 + ... + 4803.

It is an arithmetic number, because the mean of its divisors is an integer number (104742).

2⁴⁰⁹⁴⁰³ is an apocalyptic number.

409403 is a gapful number since it is divisible by the number (43) formed by its first and last digit.

409403 is a deficient number, since it is larger than the sum of its proper divisors (9565).

409403 is an equidigital number, since it uses as much as digits as its factorization.

409403 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9564.

The product of its (nonzero) digits is 432, while the sum is 20.

The square root of 409403 is about 639.8460752400. The cubic root of 409403 is about 74.2535132697.

The spelling of 409403 in words is "four hundred nine thousand, four hundred three".