129838502 has 4 divisors (see below), whose sum is σ = 194757756. Its totient is φ = 64919250.

The previous prime is 129838493. The next prime is 129838523. The reversal of 129838502 is 205838921.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 205838921 = 83 ⋅2479987.

It is a congruent number.

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, 32459624 + ... + 32459627.

It is an arithmetic number, because the mean of its divisors is an integer number (48689439).

Almost surely, 2^129838502 is an apocalyptic number.

129838502 is a deficient number, since it is larger than the sum of its proper divisors (64919254).

129838502 is an equidigital number, since it uses as much as digits as its factorization.

129838502 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64919253.

The product of its (nonzero) digits is 34560, while the sum is 38.

The square root of 129838502 is about 11394.6698942971. The cubic root of 129838502 is about 506.3698416278.

The spelling of 129838502 in words is "one hundred twenty-nine million, eight hundred thirty-eight thousand, five hundred two".