138539733 has 16 divisors (see below), whose sum is σ = 186355200. Its totient is φ = 91546560.

The previous prime is 138539717. The next prime is 138539761. The reversal of 138539733 is 337935831.

It is not a de Polignac number, because 138539733 - 2⁴ = 138539717 is a prime.

It is a super-2 number, since 2×138539733² = 38386515239422578, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138539633) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 288988 + ... + 289466.

It is an arithmetic number, because the mean of its divisors is an integer number (11647200).

Almost surely, 2^138539733 is an apocalyptic number.

It is an amenable number.

138539733 is a deficient number, since it is larger than the sum of its proper divisors (47815467).

138539733 is a wasteful number, since it uses less digits than its factorization.

138539733 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1132.

The product of its digits is 204120, while the sum is 42.

The square root of 138539733 is about 11770.2902682984. The cubic root of 138539733 is about 517.4377567558.

The spelling of 138539733 in words is "one hundred thirty-eight million, five hundred thirty-nine thousand, seven hundred thirty-three".