138493383 has 16 divisors (see below), whose sum is σ = 211249920. Its totient is φ = 79059456.

The previous prime is 138493361. The next prime is 138493387. The reversal of 138493383 is 383394831.

It is a happy number.

It is not a de Polignac number, because 138493383 - 2⁵ = 138493351 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138493387) 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, 22848 + ... + 28266.

It is an arithmetic number, because the mean of its divisors is an integer number (13203120).

Almost surely, 2^138493383 is an apocalyptic number.

138493383 is a deficient number, since it is larger than the sum of its proper divisors (72756537).

138493383 is a wasteful number, since it uses less digits than its factorization.

138493383 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6646.

The product of its digits is 186624, while the sum is 42.

The square root of 138493383 is about 11768.3211631906. The cubic root of 138493383 is about 517.3800454777.

It can be divided in two parts, 138 and 493383, that added together give a triangular number (493521 = T₉₉₃).

The spelling of 138493383 in words is "one hundred thirty-eight million, four hundred ninety-three thousand, three hundred eighty-three".