139094305865 has 4 divisors (see below), whose sum is σ = 166913167044. Its totient is φ = 111275444688.

The previous prime is 139094305843. The next prime is 139094305871. The reversal of 139094305865 is 568503490931.

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 81036439561 + 58057866304 = 284669^2 + 240952^2 .

It is a cyclic number.

It is not a de Polignac number, because 139094305865 - 2¹⁸ = 139094043721 is a prime.

It is a Duffinian 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, 13909430582 + ... + 13909430591.

It is an arithmetic number, because the mean of its divisors is an integer number (41728291761).

Almost surely, 2^139094305865 is an apocalyptic number.

It is an amenable number.

139094305865 is a deficient number, since it is larger than the sum of its proper divisors (27818861179).

139094305865 is an equidigital number, since it uses as much as digits as its factorization.

139094305865 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27818861178.

The product of its (nonzero) digits is 3499200, while the sum is 53.

The spelling of 139094305865 in words is "one hundred thirty-nine billion, ninety-four million, three hundred five thousand, eight hundred sixty-five".