138716929 has 8 divisors (see below), whose sum is σ = 157250240. Its totient is φ = 121306896.

The previous prime is 138716911. The next prime is 138716939. The reversal of 138716929 is 929617831.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 138716929 - 2⁷ = 138716801 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (138716939) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 280557 + ... + 281050.

It is an arithmetic number, because the mean of its divisors is an integer number (19656280).

Almost surely, 2^138716929 is an apocalyptic number.

138716929 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

It is an amenable number.

138716929 is a deficient number, since it is larger than the sum of its proper divisors (18533311).

138716929 is a wasteful number, since it uses less digits than its factorization.

138716929 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 561639.

The product of its digits is 163296, while the sum is 46.

The square root of 138716929 is about 11777.8151199618. The cubic root of 138716929 is about 517.6582683161.

The spelling of 138716929 in words is "one hundred thirty-eight million, seven hundred sixteen thousand, nine hundred twenty-nine".