138273794 has 4 divisors (see below), whose sum is σ = 207410694. Its totient is φ = 69136896.

The previous prime is 138273781. The next prime is 138273799. The reversal of 138273794 is 497372831.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 103286569 + 34987225 = 10163^2 + 5915^2 .

It is not an unprimeable number, because it can be changed into a prime (138273799) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34568447 + ... + 34568450.

Almost surely, 2^138273794 is an apocalyptic number.

138273794 is a deficient number, since it is larger than the sum of its proper divisors (69136900).

138273794 is an equidigital number, since it uses as much as digits as its factorization.

138273794 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69136899.

The product of its digits is 254016, while the sum is 44.

The square root of 138273794 is about 11758.9877965750. The cubic root of 138273794 is about 517.1064558356.

It can be divided in two parts, 1382737 and 94, that added together give a palindrome (1382831).

The spelling of 138273794 in words is "one hundred thirty-eight million, two hundred seventy-three thousand, seven hundred ninety-four".