720564877 has 2 divisors, whose sum is σ = 720564878. Its totient is φ = 720564876.

The previous prime is 720564851. The next prime is 720564893. The reversal of 720564877 is 778465027.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 440538121 + 280026756 = 20989^2 + 16734^2 .

It is a cyclic number.

It is not a de Polignac number, because 720564877 - 2¹⁹ = 720040589 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (720564847) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 360282438 + 360282439.

It is an arithmetic number, because the mean of its divisors is an integer number (360282439).

Almost surely, 2^720564877 is an apocalyptic number.

It is an amenable number.

720564877 is a deficient number, since it is larger than the sum of its proper divisors (1).

720564877 is an equidigital number, since it uses as much as digits as its factorization.

720564877 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 658560, while the sum is 46.

The square root of 720564877 is about 26843.3395277115. The cubic root of 720564877 is about 896.5152808616.

The spelling of 720564877 in words is "seven hundred twenty million, five hundred sixty-four thousand, eight hundred seventy-seven".