409913 has 8 divisors (see below), whose sum is σ = 483840. Its totient is φ = 339840.

The previous prime is 409909. The next prime is 409933. The reversal of 409913 is 319904.

It is a happy number.

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 409913 - 2² = 409909 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (409933) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 728 + ... + 1161.

It is an arithmetic number, because the mean of its divisors is an integer number (60480).

2⁴⁰⁹⁹¹³ is an apocalyptic number.

It is an amenable number.

409913 is a deficient number, since it is larger than the sum of its proper divisors (73927).

409913 is a wasteful number, since it uses less digits than its factorization.

409913 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1927.

The product of its (nonzero) digits is 972, while the sum is 26.

The square root of 409913 is about 640.2444845526. The cubic root of 409913 is about 74.2843334133.

Subtracting from 409913 its reverse (319904), we obtain a palindrome (90009).

The spelling of 409913 in words is "four hundred nine thousand, nine hundred thirteen".