13979141399161 has 3 divisors (see below), whose sum is σ = 13979145138031. Its totient is φ = 13979137660292.

The previous prime is 13979141399149. The next prime is 13979141399183. The reversal of 13979141399161 is 16199314197931.

The square root of 13979141399161 is 3738869.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in only one way, i.e., 306451923561 + 13672689475600 = 553581^2 + 3697660^2 .

It is not a de Polignac number, because 13979141399161 - 2¹⁹ = 13979140874873 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 13979141399093 and 13979141399102.

It is not an unprimeable number, because it can be changed into a prime (13979141399141) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 1869435 + ... + 5608303.

Almost surely, 2^{13979141399161} is an apocalyptic number.

13979141399161 is the 3738869-th square number.

13979141399161 is the 1869435-th centered octagonal number.

It is an amenable number.

13979141399161 is a deficient number, since it is larger than the sum of its proper divisors (3738870).

13979141399161 is an frugal number, since it uses more digits than its factorization.

13979141399161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7477738 (or 3738869 counting only the distinct ones).

The product of its digits is 9920232, while the sum is 64.

Multiplying 13979141399161 by its sum of digits (64), we get a square (894665049546304 = 29910952²).

The spelling of 13979141399161 in words is "thirteen trillion, nine hundred seventy-nine billion, one hundred forty-one million, three hundred ninety-nine thousand, one hundred sixty-one".