138706322 has 8 divisors (see below), whose sum is σ = 210397500. Its totient is φ = 68573824.

The previous prime is 138706319. The next prime is 138706343. The reversal of 138706322 is 223607831.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 136913401 + 1792921 = 11701^2 + 1339^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 389447 + ... + 389802.

Almost surely, 2^138706322 is an apocalyptic number.

138706322 is a deficient number, since it is larger than the sum of its proper divisors (71691178).

138706322 is an equidigital number, since it uses as much as digits as its factorization.

138706322 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 779340.

The product of its (nonzero) digits is 12096, while the sum is 32.

The square root of 138706322 is about 11777.3648156113. The cubic root of 138706322 is about 517.6450737208.

The spelling of 138706322 in words is "one hundred thirty-eight million, seven hundred six thousand, three hundred twenty-two".