6445613 has 4 divisors (see below), whose sum is σ = 6653568. Its totient is φ = 6237660.

The previous prime is 6445597. The next prime is 6445619. The reversal of 6445613 is 3165446.

It is a happy number.

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 cyclic number.

It is not a de Polignac number, because 6445613 - 2⁴ = 6445597 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 (6445619) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 103931 + ... + 103992.

It is an arithmetic number, because the mean of its divisors is an integer number (1663392).

Almost surely, 2^6445613 is an apocalyptic number.

It is an amenable number.

6445613 is a deficient number, since it is larger than the sum of its proper divisors (207955).

6445613 is a wasteful number, since it uses less digits than its factorization.

6445613 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 207954.

The product of its digits is 8640, while the sum is 29.

The square root of 6445613 is about 2538.8211831478. The cubic root of 6445613 is about 186.1035862670.

The spelling of 6445613 in words is "six million, four hundred forty-five thousand, six hundred thirteen".