6723239 has 4 divisors (see below), whose sum is σ = 6748320. Its totient is φ = 6698160.

The previous prime is 6723217. The next prime is 6723251. The reversal of 6723239 is 9323276.

It is a happy number.

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 6723239 - 2¹² = 6719143 is a prime.

It is a super-2 number, since 2×6723239² = 90403885302242, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6723259) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12134 + ... + 12675.

It is an arithmetic number, because the mean of its divisors is an integer number (1687080).

Almost surely, 2^6723239 is an apocalyptic number.

6723239 is a deficient number, since it is larger than the sum of its proper divisors (25081).

6723239 is a wasteful number, since it uses less digits than its factorization.

6723239 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25080.

The product of its digits is 13608, while the sum is 32.

The square root of 6723239 is about 2592.9209397897. The cubic root of 6723239 is about 188.7380730151.

The spelling of 6723239 in words is "six million, seven hundred twenty-three thousand, two hundred thirty-nine".