138837523 has 16 divisors (see below), whose sum is σ = 154344960. Its totient is φ = 123832800.

The previous prime is 138837481. The next prime is 138837527. The reversal of 138837523 is 325738831.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-138837523 is a prime.

It is not an unprimeable number, because it can be changed into a prime (138837527) 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, 170788 + ... + 171598.

It is an arithmetic number, because the mean of its divisors is an integer number (9646560).

Almost surely, 2^138837523 is an apocalyptic number.

138837523 is a deficient number, since it is larger than the sum of its proper divisors (15507437).

138837523 is a wasteful number, since it uses less digits than its factorization.

138837523 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1098.

The product of its digits is 120960, while the sum is 40.

The square root of 138837523 is about 11782.9335481450. The cubic root of 138837523 is about 517.8082341498.

The spelling of 138837523 in words is "one hundred thirty-eight million, eight hundred thirty-seven thousand, five hundred twenty-three".