129170479 has 2 divisors, whose sum is σ = 129170480. Its totient is φ = 129170478.

The previous prime is 129170453. The next prime is 129170497. The reversal of 129170479 is 974071921.

Together with next prime (129170497) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is an emirp because it is prime and its reverse (974071921) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 129170479 - 2¹³ = 129162287 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (129170449) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64585239 + 64585240.

It is an arithmetic number, because the mean of its divisors is an integer number (64585240).

Almost surely, 2^129170479 is an apocalyptic number.

129170479 is a deficient number, since it is larger than the sum of its proper divisors (1).

129170479 is an equidigital number, since it uses as much as digits as its factorization.

129170479 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 31752, while the sum is 40.

The square root of 129170479 is about 11365.3191332228. The cubic root of 129170479 is about 505.4999186332.

The spelling of 129170479 in words is "one hundred twenty-nine million, one hundred seventy thousand, four hundred seventy-nine".