129503683 has 4 divisors (see below), whose sum is σ = 129799120. Its totient is φ = 129208248.

The previous prime is 129503681. The next prime is 129503687. The reversal of 129503683 is 386305921.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 129503683 - 2¹ = 129503681 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (129503681) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 147060 + ... + 147937.

It is an arithmetic number, because the mean of its divisors is an integer number (32449780).

Almost surely, 2^129503683 is an apocalyptic number.

129503683 is a deficient number, since it is larger than the sum of its proper divisors (295437).

129503683 is an equidigital number, since it uses as much as digits as its factorization.

129503683 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 295436.

The product of its (nonzero) digits is 38880, while the sum is 37.

The square root of 129503683 is about 11379.9684973202. The cubic root of 129503683 is about 505.9342025189.

The spelling of 129503683 in words is "one hundred twenty-nine million, five hundred three thousand, six hundred eighty-three".