139250065 has 4 divisors (see below), whose sum is σ = 167100084. Its totient is φ = 111400048.

The previous prime is 139250029. The next prime is 139250071. The reversal of 139250065 is 560052931.

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 61968384 + 77281681 = 7872^2 + 8791^2 .

It is a cyclic number.

It is not a de Polignac number, because 139250065 - 2⁷ = 139249937 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 13925002 + ... + 13925011.

It is an arithmetic number, because the mean of its divisors is an integer number (41775021).

Almost surely, 2^139250065 is an apocalyptic number.

It is an amenable number.

139250065 is a deficient number, since it is larger than the sum of its proper divisors (27850019).

139250065 is an equidigital number, since it uses as much as digits as its factorization.

139250065 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27850018.

The product of its (nonzero) digits is 8100, while the sum is 31.

The square root of 139250065 is about 11800.4264753440. The cubic root of 139250065 is about 518.3205990284.

The spelling of 139250065 in words is "one hundred thirty-nine million, two hundred fifty thousand, sixty-five".