720439 has 2 divisors, whose sum is σ = 720440. Its totient is φ = 720438.

The previous prime is 720413. The next prime is 720481. The reversal of 720439 is 934027.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 720439 - 2⁵ = 720407 is a prime.

It is equal to p₅₈₀₆₆ and since 720439 and 58066 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (721439) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 360219 + 360220.

It is an arithmetic number, because the mean of its divisors is an integer number (360220).

2⁷²⁰⁴³⁹ is an apocalyptic number.

720439 is a deficient number, since it is larger than the sum of its proper divisors (1).

720439 is an equidigital number, since it uses as much as digits as its factorization.

720439 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1512, while the sum is 25.

The square root of 720439 is about 848.7867812354. The cubic root of 720439 is about 89.6463073106.

The spelling of 720439 in words is "seven hundred twenty thousand, four hundred thirty-nine".