720680867 has 2 divisors, whose sum is σ = 720680868. Its totient is φ = 720680866.

The previous prime is 720680861. The next prime is 720680921. The reversal of 720680867 is 768086027.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 720680867 - 2¹⁶ = 720615331 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (720680861) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 360340433 + 360340434.

It is an arithmetic number, because the mean of its divisors is an integer number (360340434).

Almost surely, 2^720680867 is an apocalyptic number.

720680867 is a deficient number, since it is larger than the sum of its proper divisors (1).

720680867 is an equidigital number, since it uses as much as digits as its factorization.

720680867 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 225792, while the sum is 44.

The square root of 720680867 is about 26845.4999394684. The cubic root of 720680867 is about 896.5633825809.

The spelling of 720680867 in words is "seven hundred twenty million, six hundred eighty thousand, eight hundred sixty-seven".