138274433 has 4 divisors (see below), whose sum is σ = 150844848. Its totient is φ = 125704020.

The previous prime is 138274421. The next prime is 138274441. The reversal of 138274433 is 334472831.

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 not a de Polignac number, because 138274433 - 2¹² = 138270337 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 138274393 and 138274402.

It is not an unprimeable number, because it can be changed into a prime (138274463) 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, 6285191 + ... + 6285212.

It is an arithmetic number, because the mean of its divisors is an integer number (37711212).

Almost surely, 2^138274433 is an apocalyptic number.

It is an amenable number.

138274433 is a deficient number, since it is larger than the sum of its proper divisors (12570415).

138274433 is a wasteful number, since it uses less digits than its factorization.

138274433 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12570414.

The product of its digits is 48384, while the sum is 35.

The square root of 138274433 is about 11759.0149672496. The cubic root of 138274433 is about 517.1072523966.

The spelling of 138274433 in words is "one hundred thirty-eight million, two hundred seventy-four thousand, four hundred thirty-three".