13938279732617 has 4 divisors (see below), whose sum is σ = 14758178540436. Its totient is φ = 13118380924800.

The previous prime is 13938279732607. The next prime is 13938279732697. The reversal of 13938279732617 is 71623797283931.

It is a happy number.

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 10767953479936 + 3170326252681 = 3281456^2 + 1780541^2 .

It is a cyclic number.

It is not a de Polignac number, because 13938279732617 - 2⁸ = 13938279732361 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13938279732607) 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, 409949403884 + ... + 409949403917.

It is an arithmetic number, because the mean of its divisors is an integer number (3689544635109).

Almost surely, 2^{13938279732617} is an apocalyptic number.

13938279732617 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

It is an amenable number.

13938279732617 is a deficient number, since it is larger than the sum of its proper divisors (819898807819).

13938279732617 is an equidigital number, since it uses as much as digits as its factorization.

13938279732617 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 819898807818.

The product of its digits is 144027072, while the sum is 68.

The spelling of 13938279732617 in words is "thirteen trillion, nine hundred thirty-eight billion, two hundred seventy-nine million, seven hundred thirty-two thousand, six hundred seventeen".