139188485 has 4 divisors (see below), whose sum is σ = 167026188. Its totient is φ = 111350784.

The previous prime is 139188473. The next prime is 139188521. The reversal of 139188485 is 584881931.

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 110523169 + 28665316 = 10513^2 + 5354^2 .

It is a cyclic number.

It is not a de Polignac number, because 139188485 - 2¹⁴ = 139172101 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13918844 + ... + 13918853.

It is an arithmetic number, because the mean of its divisors is an integer number (41756547).

Almost surely, 2^139188485 is an apocalyptic number.

It is an amenable number.

139188485 is a deficient number, since it is larger than the sum of its proper divisors (27837703).

139188485 is an equidigital number, since it uses as much as digits as its factorization.

139188485 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27837702.

The product of its digits is 276480, while the sum is 47.

The square root of 139188485 is about 11797.8169590819. The cubic root of 139188485 is about 518.2441828136.

The spelling of 139188485 in words is "one hundred thirty-nine million, one hundred eighty-eight thousand, four hundred eighty-five".