6720339 has 4 divisors (see below), whose sum is σ = 8960456. Its totient is φ = 4480224.

The previous prime is 6720331. The next prime is 6720353. The reversal of 6720339 is 9330276.

It is a happy number.

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

It is not a de Polignac number, because 6720339 - 2³ = 6720331 is a prime.

It is a D-number.

It is a Duffinian number.

6720339 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (6720331) 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, 1120054 + ... + 1120059.

It is an arithmetic number, because the mean of its divisors is an integer number (2240114).

Almost surely, 2^6720339 is an apocalyptic number.

6720339 is a deficient number, since it is larger than the sum of its proper divisors (2240117).

6720339 is a wasteful number, since it uses less digits than its factorization.

6720339 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2240116.

The product of its (nonzero) digits is 6804, while the sum is 30.

The square root of 6720339 is about 2592.3616645831. The cubic root of 6720339 is about 188.7109323701.

The spelling of 6720339 in words is "six million, seven hundred twenty thousand, three hundred thirty-nine".