720129791 has 2 divisors, whose sum is σ = 720129792. Its totient is φ = 720129790.

The previous prime is 720129749. The next prime is 720129797. The reversal of 720129791 is 197921027.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 720129791 - 2⁶ = 720129727 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (720129797) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 360064895 + 360064896.

It is an arithmetic number, because the mean of its divisors is an integer number (360064896).

Almost surely, 2^720129791 is an apocalyptic number.

720129791 is a deficient number, since it is larger than the sum of its proper divisors (1).

720129791 is an equidigital number, since it uses as much as digits as its factorization.

720129791 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 15876, while the sum is 38.

The square root of 720129791 is about 26835.2341335044. The cubic root of 720129791 is about 896.3348021871.

The spelling of 720129791 in words is "seven hundred twenty million, one hundred twenty-nine thousand, seven hundred ninety-one".