138783193 has 4 divisors (see below), whose sum is σ = 138872448. Its totient is φ = 138693940.

The previous prime is 138783157. The next prime is 138783247. The reversal of 138783193 is 391387831.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-138783193 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (138783143) 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 3 ways as a sum of consecutive naturals, for example, 42253 + ... + 45418.

It is an arithmetic number, because the mean of its divisors is an integer number (34718112).

Almost surely, 2^138783193 is an apocalyptic number.

It is an amenable number.

138783193 is a deficient number, since it is larger than the sum of its proper divisors (89255).

138783193 is an equidigital number, since it uses as much as digits as its factorization.

138783193 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 89254.

The product of its digits is 108864, while the sum is 43.

The square root of 138783193 is about 11780.6278695153. The cubic root of 138783193 is about 517.7406823066.

It can be divided in two parts, 13878 and 3193, that added together give a palindrome (17071).

The spelling of 138783193 in words is "one hundred thirty-eight million, seven hundred eighty-three thousand, one hundred ninety-three".