720507457 has 2 divisors, whose sum is σ = 720507458. Its totient is φ = 720507456.

The previous prime is 720507451. The next prime is 720507497. The reversal of 720507457 is 754705027.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 713103616 + 7403841 = 26704^2 + 2721^2 .

It is a cyclic number.

It is not a de Polignac number, because 720507457 - 2²⁷ = 586289729 is a prime.

It is not a weakly prime, because it can be changed into another prime (720507451) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 360253728 + 360253729.

It is an arithmetic number, because the mean of its divisors is an integer number (360253729).

Almost surely, 2^720507457 is an apocalyptic number.

It is an amenable number.

720507457 is a deficient number, since it is larger than the sum of its proper divisors (1).

720507457 is an equidigital number, since it uses as much as digits as its factorization.

720507457 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 68600, while the sum is 37.

The square root of 720507457 is about 26842.2699673481. The cubic root of 720507457 is about 896.4914665475.

It can be divided in two parts, 72050 and 7457, that added together give a cube (79507 = 43³).

The spelling of 720507457 in words is "seven hundred twenty million, five hundred seven thousand, four hundred fifty-seven".