209413 has 4 divisors (see below), whose sum is σ = 212908. Its totient is φ = 205920.

The previous prime is 209401. The next prime is 209431. The reversal of 209413 is 314902.

209413 is nontrivially palindromic in base 7.

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 31329 + 178084 = 177^2 + 422^2 .

It is a cyclic number.

It is not a de Polignac number, because 209413 - 2⁵ = 209381 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (209213) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1656 + ... + 1777.

It is an arithmetic number, because the mean of its divisors is an integer number (53227).

2²⁰⁹⁴¹³ is an apocalyptic number.

It is an amenable number.

209413 is a deficient number, since it is larger than the sum of its proper divisors (3495).

209413 is an equidigital number, since it uses as much as digits as its factorization.

209413 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3494.

The product of its (nonzero) digits is 216, while the sum is 19.

The square root of 209413 is about 457.6166517949. The cubic root of 209413 is about 59.3837855882.

The spelling of 209413 in words is "two hundred nine thousand, four hundred thirteen".