139573538 has 16 divisors (see below), whose sum is σ = 228002040. Its totient is φ = 63693696.

The previous prime is 139573537. The next prime is 139573541. The reversal of 139573538 is 835375931.

It can be written as a sum of positive squares in 4 ways, for example, as 28334329 + 111239209 = 5323^2 + 10547^2 .

It is not an unprimeable number, because it can be changed into a prime (139573531) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 27845 + ... + 32472.

Almost surely, 2^139573538 is an apocalyptic number.

139573538 is a deficient number, since it is larger than the sum of its proper divisors (88428502).

139573538 is a wasteful number, since it uses less digits than its factorization.

139573538 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60421.

The product of its digits is 340200, while the sum is 44.

The square root of 139573538 is about 11814.1245126332. The cubic root of 139573538 is about 518.7216354937.

The spelling of 139573538 in words is "one hundred thirty-nine million, five hundred seventy-three thousand, five hundred thirty-eight".