129122579 has 2 divisors, whose sum is σ = 129122580. Its totient is φ = 129122578.

The previous prime is 129122573. The next prime is 129122627. The reversal of 129122579 is 975221921.

It is a weak prime.

It is an emirp because it is prime and its reverse (975221921) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-129122579 is a prime.

It is a super-2 number, since 2×129122579² = 33345280815222482, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (129122573) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64561289 + 64561290.

It is an arithmetic number, because the mean of its divisors is an integer number (64561290).

Almost surely, 2^129122579 is an apocalyptic number.

129122579 is a deficient number, since it is larger than the sum of its proper divisors (1).

129122579 is an equidigital number, since it uses as much as digits as its factorization.

129122579 is an evil number, because the sum of its binary digits is even.

The product of its digits is 22680, while the sum is 38.

The square root of 129122579 is about 11363.2116498814. The cubic root of 129122579 is about 505.4374264397.

The spelling of 129122579 in words is "one hundred twenty-nine million, one hundred twenty-two thousand, five hundred seventy-nine".