720943 has 2 divisors, whose sum is σ = 720944. Its totient is φ = 720942.

The previous prime is 720931. The next prime is 720947. The reversal of 720943 is 349027.

720943 is nontrivially palindromic in base 7.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-720943 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (720947) by changing a digit.

It is a good prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 360471 + 360472.

It is an arithmetic number, because the mean of its divisors is an integer number (360472).

2⁷²⁰⁹⁴³ is an apocalyptic number.

720943 is a deficient number, since it is larger than the sum of its proper divisors (1).

720943 is an equidigital number, since it uses as much as digits as its factorization.

720943 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 720943 is about 849.0836236791. The cubic root of 720943 is about 89.6672071633.

The spelling of 720943 in words is "seven hundred twenty thousand, nine hundred forty-three".