138774709 has 8 divisors (see below), whose sum is σ = 148341312. Its totient is φ = 129502560.

The previous prime is 138774703. The next prime is 138774721. The reversal of 138774709 is 907477831.

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 138774709 - 2⁵ = 138774677 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138774703) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 72639 + ... + 74524.

It is an arithmetic number, because the mean of its divisors is an integer number (18542664).

Almost surely, 2^138774709 is an apocalyptic number.

It is an amenable number.

138774709 is a deficient number, since it is larger than the sum of its proper divisors (9566603).

138774709 is a wasteful number, since it uses less digits than its factorization.

138774709 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 147227.

The product of its (nonzero) digits is 296352, while the sum is 46.

The square root of 138774709 is about 11780.2677813367. The cubic root of 138774709 is about 517.7301320342.

The spelling of 138774709 in words is "one hundred thirty-eight million, seven hundred seventy-four thousand, seven hundred nine".