720772867 has 2 divisors, whose sum is σ = 720772868. Its totient is φ = 720772866.

The previous prime is 720772769. The next prime is 720772883. The reversal of 720772867 is 768277027.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 720772867 - 2¹⁹ = 720248579 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (720776867) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 360386433 + 360386434.

It is an arithmetic number, because the mean of its divisors is an integer number (360386434).

Almost surely, 2^720772867 is an apocalyptic number.

720772867 is a deficient number, since it is larger than the sum of its proper divisors (1).

720772867 is an equidigital number, since it uses as much as digits as its factorization.

720772867 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 460992, while the sum is 46.

The square root of 720772867 is about 26847.2133935722. The cubic root of 720772867 is about 896.6015318391.

The spelling of 720772867 in words is "seven hundred twenty million, seven hundred seventy-two thousand, eight hundred sixty-seven".