138809353 has 4 divisors (see below), whose sum is σ = 138857680. Its totient is φ = 138761028.

The previous prime is 138809329. The next prime is 138809371. The reversal of 138809353 is 353908831.

It is a happy number.

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 138809353 - 2²⁵ = 105254921 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (138809323) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19563 + ... + 25696.

It is an arithmetic number, because the mean of its divisors is an integer number (34714420).

Almost surely, 2^138809353 is an apocalyptic number.

It is an amenable number.

138809353 is a deficient number, since it is larger than the sum of its proper divisors (48327).

138809353 is an equidigital number, since it uses as much as digits as its factorization.

138809353 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48326.

The product of its (nonzero) digits is 77760, while the sum is 40.

The square root of 138809353 is about 11781.7381145568. The cubic root of 138809353 is about 517.7732108499.

The spelling of 138809353 in words is "one hundred thirty-eight million, eight hundred nine thousand, three hundred fifty-three".