728101117 has 2 divisors, whose sum is σ = 728101118. Its totient is φ = 728101116.

The previous prime is 728101097. The next prime is 728101139. The reversal of 728101117 is 711101827.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 712569636 + 15531481 = 26694^2 + 3941^2 .

It is a cyclic number.

It is not a de Polignac number, because 728101117 - 2²³ = 719712509 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 (708101117) 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, 364050558 + 364050559.

It is an arithmetic number, because the mean of its divisors is an integer number (364050559).

Almost surely, 2^728101117 is an apocalyptic number.

It is an amenable number.

728101117 is a deficient number, since it is larger than the sum of its proper divisors (1).

728101117 is an equidigital number, since it uses as much as digits as its factorization.

728101117 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 784, while the sum is 28.

The square root of 728101117 is about 26983.3488840803. The cubic root of 728101117 is about 899.6299371585.

The spelling of 728101117 in words is "seven hundred twenty-eight million, one hundred one thousand, one hundred seventeen".