139665293773 has 4 divisors (see below), whose sum is σ = 139900817628. Its totient is φ = 139429769920.

The previous prime is 139665293711. The next prime is 139665293783. The reversal of 139665293773 is 377392566931.

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 50289408009 + 89375885764 = 224253^2 + 298958^2 .

It is a cyclic number.

It is not a de Polignac number, because 139665293773 - 2¹³ = 139665285581 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (139665293783) 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, 117761038 + ... + 117762223.

It is an arithmetic number, because the mean of its divisors is an integer number (34975204407).

Almost surely, 2^139665293773 is an apocalyptic number.

It is an amenable number.

139665293773 is a deficient number, since it is larger than the sum of its proper divisors (235523855).

139665293773 is an equidigital number, since it uses as much as digits as its factorization.

139665293773 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 235523854.

The product of its digits is 38578680, while the sum is 61.

The spelling of 139665293773 in words is "one hundred thirty-nine billion, six hundred sixty-five million, two hundred ninety-three thousand, seven hundred seventy-three".