1273939665393 has 8 divisors (see below), whose sum is σ = 1705693276800. Its totient is φ = 845739582128.

The previous prime is 1273939665359. The next prime is 1273939665403. The reversal of 1273939665393 is 3935669393721.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1273939665393 - 2¹² = 1273939661297 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1273939665353) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 888381198 + ... + 888382631.

It is an arithmetic number, because the mean of its divisors is an integer number (213211659600).

Almost surely, 2^{1273939665393} is an apocalyptic number.

It is an amenable number.

1273939665393 is a deficient number, since it is larger than the sum of its proper divisors (431753611407).

1273939665393 is a wasteful number, since it uses less digits than its factorization.

1273939665393 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1776764071.

The product of its digits is 148803480, while the sum is 66.

The spelling of 1273939665393 in words is "one trillion, two hundred seventy-three billion, nine hundred thirty-nine million, six hundred sixty-five thousand, three hundred ninety-three".