129919503 has 16 divisors (see below), whose sum is σ = 198132480. Its totient is φ = 74179776.

The previous prime is 129919501. The next prime is 129919513. The reversal of 129919503 is 305919921.

It is not a de Polignac number, because 129919503 - 2¹ = 129919501 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129919501) by changing a digit.

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 in 15 ways as a sum of consecutive naturals, for example, 46243 + ... + 48971.

It is an arithmetic number, because the mean of its divisors is an integer number (12383280).

Almost surely, 2^129919503 is an apocalyptic number.

129919503 is a deficient number, since it is larger than the sum of its proper divisors (68212977).

129919503 is a wasteful number, since it uses less digits than its factorization.

129919503 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5006.

The product of its (nonzero) digits is 21870, while the sum is 39.

The square root of 129919503 is about 11398.2236773982. The cubic root of 129919503 is about 506.4751209719.

It can be divided in two parts, 1299 and 19503, that added together give a palindrome (20802).

The spelling of 129919503 in words is "one hundred twenty-nine million, nine hundred nineteen thousand, five hundred three".