6723439 has 2 divisors, whose sum is σ = 6723440. Its totient is φ = 6723438.

The previous prime is 6723427. The next prime is 6723443. The reversal of 6723439 is 9343276.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6723439 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6723499) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3361719 + 3361720.

It is an arithmetic number, because the mean of its divisors is an integer number (3361720).

Almost surely, 2^6723439 is an apocalyptic number.

6723439 is a deficient number, since it is larger than the sum of its proper divisors (1).

6723439 is an equidigital number, since it uses as much as digits as its factorization.

6723439 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 27216, while the sum is 34.

The square root of 6723439 is about 2592.9595060471. The cubic root of 6723439 is about 188.7399444960.

The spelling of 6723439 in words is "six million, seven hundred twenty-three thousand, four hundred thirty-nine".