720735101 has 2 divisors, whose sum is σ = 720735102. Its totient is φ = 720735100.

The previous prime is 720735097. The next prime is 720735121. The reversal of 720735101 is 101537027.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 571162201 + 149572900 = 23899^2 + 12230^2 .

It is an emirp because it is prime and its reverse (101537027) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 720735101 - 2² = 720735097 is a 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 (720735121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 360367550 + 360367551.

It is an arithmetic number, because the mean of its divisors is an integer number (360367551).

Almost surely, 2^720735101 is an apocalyptic number.

It is an amenable number.

720735101 is a deficient number, since it is larger than the sum of its proper divisors (1).

720735101 is an equidigital number, since it uses as much as digits as its factorization.

720735101 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1470, while the sum is 26.

The square root of 720735101 is about 26846.5100338945. The cubic root of 720735101 is about 896.5858719614.

The spelling of 720735101 in words is "seven hundred twenty million, seven hundred thirty-five thousand, one hundred one".