138129683 has 4 divisors (see below), whose sum is σ = 139878240. Its totient is φ = 136381128.

The previous prime is 138129671. The next prime is 138129703. The reversal of 138129683 is 386921831.

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 138129683 - 2⁸ = 138129427 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 138129683.

It is not an unprimeable number, because it can be changed into a prime (138129643) 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, 874160 + ... + 874317.

It is an arithmetic number, because the mean of its divisors is an integer number (34969560).

Almost surely, 2^138129683 is an apocalyptic number.

138129683 is a deficient number, since it is larger than the sum of its proper divisors (1748557).

138129683 is an equidigital number, since it uses as much as digits as its factorization.

138129683 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1748556.

The product of its digits is 62208, while the sum is 41.

The square root of 138129683 is about 11752.8585033599. The cubic root of 138129683 is about 516.9267480492.

The spelling of 138129683 in words is "one hundred thirty-eight million, one hundred twenty-nine thousand, six hundred eighty-three".