408613 has 4 divisors (see below), whose sum is σ = 410220. Its totient is φ = 407008.

The previous prime is 408607. The next prime is 408623. The reversal of 408613 is 316804.

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 161604 + 247009 = 402^2 + 497^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-408613 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (408623) 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, 328 + ... + 961.

It is an arithmetic number, because the mean of its divisors is an integer number (102555).

2⁴⁰⁸⁶¹³ is an apocalyptic number.

It is an amenable number.

408613 is a deficient number, since it is larger than the sum of its proper divisors (1607).

408613 is a wasteful number, since it uses less digits than its factorization.

408613 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1606.

The product of its (nonzero) digits is 576, while the sum is 22.

The square root of 408613 is about 639.2284411695. The cubic root of 408613 is about 74.2057216910.

Subtracting from 408613 its reverse (316804), we obtain a square (91809 = 303²).

The spelling of 408613 in words is "four hundred eight thousand, six hundred thirteen".