138032709 has 8 divisors (see below), whose sum is σ = 188323872. Its totient is φ = 89881680.

The previous prime is 138032693. The next prime is 138032731. The reversal of 138032709 is 907230831.

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

It is not a de Polignac number, because 138032709 - 2⁴ = 138032693 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 138032709.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138032759) 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, 534882 + ... + 535139.

It is an arithmetic number, because the mean of its divisors is an integer number (23540484).

Almost surely, 2^138032709 is an apocalyptic number.

It is an amenable number.

138032709 is a deficient number, since it is larger than the sum of its proper divisors (50291163).

138032709 is a wasteful number, since it uses less digits than its factorization.

138032709 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1070067.

The product of its (nonzero) digits is 9072, while the sum is 33.

The square root of 138032709 is about 11748.7322294791. The cubic root of 138032709 is about 516.8057501848.

The spelling of 138032709 in words is "one hundred thirty-eight million, thirty-two thousand, seven hundred nine".