6409213 has 4 divisors (see below), whose sum is σ = 6746560. Its totient is φ = 6071868.

The previous prime is 6409201. The next prime is 6409217. The reversal of 6409213 is 3129046.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a de Polignac number, because none of the positive numbers 2^k-6409213 is a prime.

It is a super-2 number, since 2×6409213² = 82156022558738, which contains 22 as substring.

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 (6409217) 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, 168645 + ... + 168682.

It is an arithmetic number, because the mean of its divisors is an integer number (1686640).

Almost surely, 2^6409213 is an apocalyptic number.

It is an amenable number.

6409213 is a deficient number, since it is larger than the sum of its proper divisors (337347).

6409213 is a wasteful number, since it uses less digits than its factorization.

6409213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 337346.

The product of its (nonzero) digits is 1296, while the sum is 25.

The square root of 6409213 is about 2531.6423523081. The cubic root of 6409213 is about 185.7526001253.

The spelling of 6409213 in words is "six million, four hundred nine thousand, two hundred thirteen".