78872352029 has 2 divisors, whose sum is σ = 78872352030. Its totient is φ = 78872352028.

The previous prime is 78872352017. The next prime is 78872352049. The reversal of 78872352029 is 92025327887.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 43668460900 + 35203891129 = 208970^2 + 187627^2 .

It is a cyclic number.

It is not a de Polignac number, because 78872352029 - 2⁸ = 78872351773 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (78872352049) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39436176014 + 39436176015.

It is an arithmetic number, because the mean of its divisors is an integer number (39436176015).

Almost surely, 2^78872352029 is an apocalyptic number.

It is an amenable number.

78872352029 is a deficient number, since it is larger than the sum of its proper divisors (1).

78872352029 is an equidigital number, since it uses as much as digits as its factorization.

78872352029 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3386880, while the sum is 53.

The spelling of 78872352029 in words is "seventy-eight billion, eight hundred seventy-two million, three hundred fifty-two thousand, twenty-nine".