6389813 has 4 divisors (see below), whose sum is σ = 6595968. Its totient is φ = 6183660.

The previous prime is 6389797. The next prime is 6389819. The reversal of 6389813 is 3189836.

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 6389813 - 2⁴ = 6389797 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 (6389819) 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, 103031 + ... + 103092.

It is an arithmetic number, because the mean of its divisors is an integer number (1648992).

Almost surely, 2^6389813 is an apocalyptic number.

It is an amenable number.

6389813 is a deficient number, since it is larger than the sum of its proper divisors (206155).

6389813 is a wasteful number, since it uses less digits than its factorization.

6389813 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 206154.

The product of its digits is 31104, while the sum is 38.

The square root of 6389813 is about 2527.8079436539. The cubic root of 6389813 is about 185.5649929795.

The spelling of 6389813 in words is "six million, three hundred eighty-nine thousand, eight hundred thirteen".