129223519 has 2 divisors, whose sum is σ = 129223520. Its totient is φ = 129223518.

The previous prime is 129223489. The next prime is 129223553. The reversal of 129223519 is 915322921.

It is an a-pointer prime, because the next prime (129223553) can be obtained adding 129223519 to its sum of digits (34).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 129223519 - 2⁹ = 129223007 is a prime.

It is a super-2 number, since 2×129223519² = 33397435725486722, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (129223019) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64611759 + 64611760.

It is an arithmetic number, because the mean of its divisors is an integer number (64611760).

Almost surely, 2^129223519 is an apocalyptic number.

129223519 is a deficient number, since it is larger than the sum of its proper divisors (1).

129223519 is an equidigital number, since it uses as much as digits as its factorization.

129223519 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 9720, while the sum is 34.

The square root of 129223519 is about 11367.6523081945. The cubic root of 129223519 is about 505.5690986474.

The spelling of 129223519 in words is "one hundred twenty-nine million, two hundred twenty-three thousand, five hundred nineteen".