79487129 has 2 divisors, whose sum is σ = 79487130. Its totient is φ = 79487128.

The previous prime is 79487039. The next prime is 79487143. The reversal of 79487129 is 92178497.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 64432729 + 15054400 = 8027^2 + 3880^2 .

It is an emirp because it is prime and its reverse (92178497) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 79487129 - 2¹⁶ = 79421593 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (79487029) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39743564 + 39743565.

It is an arithmetic number, because the mean of its divisors is an integer number (39743565).

Almost surely, 2^79487129 is an apocalyptic number.

It is an amenable number.

79487129 is a deficient number, since it is larger than the sum of its proper divisors (1).

79487129 is an equidigital number, since it uses as much as digits as its factorization.

79487129 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 254016, while the sum is 47.

The square root of 79487129 is about 8915.5554510081. Note that the first 3 decimals coincide. The cubic root of 79487129 is about 429.9641740478.

The spelling of 79487129 in words is "seventy-nine million, four hundred eighty-seven thousand, one hundred twenty-nine".