6399673 has 4 divisors (see below), whose sum is σ = 7313920. Its totient is φ = 5485428.

The previous prime is 6399643. The next prime is 6399677. The reversal of 6399673 is 3769936.

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 6399673 - 2⁹ = 6399161 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6399677) 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, 457113 + ... + 457126.

It is an arithmetic number, because the mean of its divisors is an integer number (1828480).

Almost surely, 2^6399673 is an apocalyptic number.

It is an amenable number.

6399673 is a deficient number, since it is larger than the sum of its proper divisors (914247).

6399673 is an equidigital number, since it uses as much as digits as its factorization.

6399673 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 914246.

The product of its digits is 183708, while the sum is 43.

The square root of 6399673 is about 2529.7574982595. The cubic root of 6399673 is about 185.6603912083.

The spelling of 6399673 in words is "six million, three hundred ninety-nine thousand, six hundred seventy-three".