138453833 has 4 divisors (see below), whose sum is σ = 158232960. Its totient is φ = 118674708.

The previous prime is 138453811. The next prime is 138453839. The reversal of 138453833 is 338354831.

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 138453833 - 2⁸ = 138453577 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (138453839) 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, 9889553 + ... + 9889566.

It is an arithmetic number, because the mean of its divisors is an integer number (39558240).

Almost surely, 2^138453833 is an apocalyptic number.

It is an amenable number.

138453833 is a deficient number, since it is larger than the sum of its proper divisors (19779127).

138453833 is an equidigital number, since it uses as much as digits as its factorization.

138453833 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19779126.

The product of its digits is 103680, while the sum is 38.

The square root of 138453833 is about 11766.6406845794. The cubic root of 138453833 is about 517.3307908286.

The spelling of 138453833 in words is "one hundred thirty-eight million, four hundred fifty-three thousand, eight hundred thirty-three".