138083018 has 4 divisors (see below), whose sum is σ = 207124530. Its totient is φ = 69041508.

The previous prime is 138083009. The next prime is 138083081. The reversal of 138083018 is 810380831.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 127080529 + 11002489 = 11273^2 + 3317^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34520753 + ... + 34520756.

Almost surely, 2^138083018 is an apocalyptic number.

138083018 is a deficient number, since it is larger than the sum of its proper divisors (69041512).

138083018 is an equidigital number, since it uses as much as digits as its factorization.

138083018 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69041511.

The product of its (nonzero) digits is 4608, while the sum is 32.

The square root of 138083018 is about 11750.8730739465. The cubic root of 138083018 is about 516.8685295617.

The spelling of 138083018 in words is "one hundred thirty-eight million, eighty-three thousand, eighteen".