720625751 has 2 divisors, whose sum is σ = 720625752. Its totient is φ = 720625750.

The previous prime is 720625729. The next prime is 720625781. The reversal of 720625751 is 157526027.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 720625751 - 2¹⁸ = 720363607 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (720625781) 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, 360312875 + 360312876.

It is an arithmetic number, because the mean of its divisors is an integer number (360312876).

Almost surely, 2^720625751 is an apocalyptic number.

720625751 is a deficient number, since it is larger than the sum of its proper divisors (1).

720625751 is an equidigital number, since it uses as much as digits as its factorization.

720625751 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 29400, while the sum is 35.

The square root of 720625751 is about 26844.4733790775. The cubic root of 720625751 is about 896.5405263027.

The spelling of 720625751 in words is "seven hundred twenty million, six hundred twenty-five thousand, seven hundred fifty-one".