138932573 has 4 divisors (see below), whose sum is σ = 149619708. Its totient is φ = 128245440.

The previous prime is 138932537. The next prime is 138932593. The reversal of 138932573 is 375239831.

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

It can be written as a sum of positive squares in 2 ways, for example, as 89624089 + 49308484 = 9467^2 + 7022^2 .

It is a cyclic number.

It is not a de Polignac number, because 138932573 - 2¹⁰ = 138931549 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 138932573.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138932593) 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, 5343548 + ... + 5343573.

It is an arithmetic number, because the mean of its divisors is an integer number (37404927).

Almost surely, 2^138932573 is an apocalyptic number.

138932573 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

138932573 is a deficient number, since it is larger than the sum of its proper divisors (10687135).

138932573 is a wasteful number, since it uses less digits than its factorization.

138932573 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10687134.

The product of its digits is 136080, while the sum is 41.

The square root of 138932573 is about 11786.9662339382. The cubic root of 138932573 is about 517.9263733103.

The spelling of 138932573 in words is "one hundred thirty-eight million, nine hundred thirty-two thousand, five hundred seventy-three".