129823208 has 8 divisors (see below), whose sum is σ = 243418530. Its totient is φ = 64911600.

The previous prime is 129823193. The next prime is 129823217. The reversal of 129823208 is 802328921.

It can be written as a sum of positive squares in only one way, i.e., 115820644 + 14002564 = 10762^2 + 3742^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-2 number, since 2×129823208² = 33708130670822528, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8113943 + ... + 8113958.

Almost surely, 2^129823208 is an apocalyptic number.

It is an amenable number.

129823208 is a deficient number, since it is larger than the sum of its proper divisors (113595322).

129823208 is a wasteful number, since it uses less digits than its factorization.

129823208 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16227907 (or 16227903 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 35.

The square root of 129823208 is about 11393.9987712831. The cubic root of 129823208 is about 506.3499586595.

It can be divided in two parts, 129823 and 208, that added together give a palindrome (130031).

The spelling of 129823208 in words is "one hundred twenty-nine million, eight hundred twenty-three thousand, two hundred eight".