138275573 has 4 divisors (see below), whose sum is σ = 141491328. Its totient is φ = 135059820.

The previous prime is 138275539. The next prime is 138275611. The reversal of 138275573 is 375572831.

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, and also an emirpimes, since its reverse is a distinct semiprime: 375572831 = 1109 ⋅338659.

It is a cyclic number.

It is not a de Polignac number, because 138275573 - 2¹² = 138271477 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 138275573.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138275273) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1607813 + ... + 1607898.

It is an arithmetic number, because the mean of its divisors is an integer number (35372832).

Almost surely, 2^138275573 is an apocalyptic number.

It is an amenable number.

138275573 is a deficient number, since it is larger than the sum of its proper divisors (3215755).

138275573 is an equidigital number, since it uses as much as digits as its factorization.

138275573 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3215754.

The product of its digits is 176400, while the sum is 41.

The square root of 138275573 is about 11759.0634405976. The cubic root of 138275573 is about 517.1086734852.

The spelling of 138275573 in words is "one hundred thirty-eight million, two hundred seventy-five thousand, five hundred seventy-three".