129252223 has 2 divisors, whose sum is σ = 129252224. Its totient is φ = 129252222.

The previous prime is 129252197. The next prime is 129252247. The reversal of 129252223 is 322252921.

It is a strong prime.

It is an emirp because it is prime and its reverse (322252921) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 129252223 - 2⁵ = 129252191 is a prime.

It is a super-2 number, since 2×129252223² = 33412274300883458, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 129252191 and 129252200.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (129256223) 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, 64626111 + 64626112.

It is an arithmetic number, because the mean of its divisors is an integer number (64626112).

Almost surely, 2^129252223 is an apocalyptic number.

129252223 is a deficient number, since it is larger than the sum of its proper divisors (1).

129252223 is an equidigital number, since it uses as much as digits as its factorization.

129252223 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4320, while the sum is 28.

The square root of 129252223 is about 11368.9147679099. The cubic root of 129252223 is about 505.6065293493.

The spelling of 129252223 in words is "one hundred twenty-nine million, two hundred fifty-two thousand, two hundred twenty-three".