129223535 has 32 divisors (see below), whose sum is σ = 182400000. Its totient is φ = 87847200.

The previous prime is 129223519. The next prime is 129223553. The reversal of 129223535 is 535322921.

It is not a de Polignac number, because 129223535 - 2⁴ = 129223519 is a prime.

It is a congruent number.

It is an unprimeable number.

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 in 31 ways as a sum of consecutive naturals, for example, 258716 + ... + 259214.

It is an arithmetic number, because the mean of its divisors is an integer number (5700000).

Almost surely, 2^129223535 is an apocalyptic number.

129223535 is a deficient number, since it is larger than the sum of its proper divisors (53176465).

129223535 is an equidigital number, since it uses as much as digits as its factorization.

129223535 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 676 (or 662 counting only the distinct ones).

The product of its digits is 16200, while the sum is 32.

The square root of 129223535 is about 11367.6530119458. The cubic root of 129223535 is about 505.5691195134.

The spelling of 129223535 in words is "one hundred twenty-nine million, two hundred twenty-three thousand, five hundred thirty-five".