720567539 has 2 divisors, whose sum is σ = 720567540. Its totient is φ = 720567538.

The previous prime is 720567517. The next prime is 720567557. The reversal of 720567539 is 935765027.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 720567539 - 2⁸ = 720567283 is a prime.

It is a Sophie Germain prime.

It is equal to p_37261997 and since 720567539 and 37261997 have the same sum of digits, it is a Honaker prime.

It is a self number, because there is not a number n which added to its sum of digits gives 720567539.

It is not a weakly prime, because it can be changed into another prime (720567509) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 360283769 + 360283770.

It is an arithmetic number, because the mean of its divisors is an integer number (360283770).

Almost surely, 2^720567539 is an apocalyptic number.

720567539 is a deficient number, since it is larger than the sum of its proper divisors (1).

720567539 is an equidigital number, since it uses as much as digits as its factorization.

720567539 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 396900, while the sum is 44.

The square root of 720567539 is about 26843.3891116602. The cubic root of 720567539 is about 896.5163848662.

The spelling of 720567539 in words is "seven hundred twenty million, five hundred sixty-seven thousand, five hundred thirty-nine".