138492383 has 4 divisors (see below), whose sum is σ = 141870288. Its totient is φ = 135114480.

The previous prime is 138492377. The next prime is 138492391. The reversal of 138492383 is 383294831.

138492383 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 383294831 = 181 ⋅2117651.

It is a cyclic number.

It is not a de Polignac number, because 138492383 - 2¹⁰ = 138491359 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (41), and also a Moran number because the ratio is a prime number: 3377863 = 138492383 / (1 + 3 + 8 + 4 + 9 + 2 + 3 + 8 + 3).

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 138492383.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138492373) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1688891 + ... + 1688972.

It is an arithmetic number, because the mean of its divisors is an integer number (35467572).

Almost surely, 2^138492383 is an apocalyptic number.

138492383 is a deficient number, since it is larger than the sum of its proper divisors (3377905).

138492383 is an equidigital number, since it uses as much as digits as its factorization.

138492383 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3377904.

The product of its digits is 124416, while the sum is 41.

The square root of 138492383 is about 11768.2786761701. The cubic root of 138492383 is about 517.3788002166.

The spelling of 138492383 in words is "one hundred thirty-eight million, four hundred ninety-two thousand, three hundred eighty-three".