79285715129 has 2 divisors, whose sum is σ = 79285715130. Its totient is φ = 79285715128.

The previous prime is 79285715107. The next prime is 79285715137. The reversal of 79285715129 is 92151758297.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 77714385529 + 1571329600 = 278773^2 + 39640^2 .

It is a cyclic number.

It is not a de Polignac number, because 79285715129 - 2³⁶ = 10566238393 is a prime.

It is not a weakly prime, because it can be changed into another prime (79285715189) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39642857564 + 39642857565.

It is an arithmetic number, because the mean of its divisors is an integer number (39642857565).

Almost surely, 2^79285715129 is an apocalyptic number.

It is an amenable number.

79285715129 is a deficient number, since it is larger than the sum of its proper divisors (1).

79285715129 is an equidigital number, since it uses as much as digits as its factorization.

79285715129 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3175200, while the sum is 56.

The spelling of 79285715129 in words is "seventy-nine billion, two hundred eighty-five million, seven hundred fifteen thousand, one hundred twenty-nine".