720860939 has 2 divisors, whose sum is σ = 720860940. Its totient is φ = 720860938.

The previous prime is 720860909. The next prime is 720860951. The reversal of 720860939 is 939068027.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 720860939 - 2⁸ = 720860683 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 720860939.

It is not a weakly prime, because it can be changed into another prime (720860909) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 360430469 + 360430470.

It is an arithmetic number, because the mean of its divisors is an integer number (360430470).

Almost surely, 2^720860939 is an apocalyptic number.

720860939 is a deficient number, since it is larger than the sum of its proper divisors (1).

720860939 is an equidigital number, since it uses as much as digits as its factorization.

720860939 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 163296, while the sum is 44.

The square root of 720860939 is about 26848.8535881888. The cubic root of 720860939 is about 896.6380492487.

The spelling of 720860939 in words is "seven hundred twenty million, eight hundred sixty thousand, nine hundred thirty-nine".