6447379 has 4 divisors (see below), whose sum is σ = 6490800. Its totient is φ = 6403960.

The previous prime is 6447323. The next prime is 6447391. The reversal of 6447379 is 9737446.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 6447379 - 2¹³ = 6439187 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6447179) 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, 21487 + ... + 21784.

It is an arithmetic number, because the mean of its divisors is an integer number (1622700).

Almost surely, 2^6447379 is an apocalyptic number.

6447379 is a deficient number, since it is larger than the sum of its proper divisors (43421).

6447379 is a wasteful number, since it uses less digits than its factorization.

6447379 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43420.

The product of its digits is 127008, while the sum is 40.

The square root of 6447379 is about 2539.1689585374. The cubic root of 6447379 is about 186.1205812331.

The spelling of 6447379 in words is "six million, four hundred forty-seven thousand, three hundred seventy-nine".