4247728129 has 2 divisors, whose sum is σ = 4247728130. Its totient is φ = 4247728128.

The previous prime is 4247728081. The next prime is 4247728151. The reversal of 4247728129 is 9218277424.

4247728129 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3694208400 + 553519729 = 60780^2 + 23527^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-4247728129 is a prime.

It is not a weakly prime, because it can be changed into another prime (4247728189) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2123864064 + 2123864065.

It is an arithmetic number, because the mean of its divisors is an integer number (2123864065).

Almost surely, 2^4247728129 is an apocalyptic number.

It is an amenable number.

4247728129 is a deficient number, since it is larger than the sum of its proper divisors (1).

4247728129 is an equidigital number, since it uses as much as digits as its factorization.

4247728129 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 451584, while the sum is 46.

The square root of 4247728129 is about 65174.5972676472. The cubic root of 4247728129 is about 1619.5172225236.

The spelling of 4247728129 in words is "four billion, two hundred forty-seven million, seven hundred twenty-eight thousand, one hundred twenty-nine".