13934191519609 has 3 divisors (see below), whose sum is σ = 13934195252463. Its totient is φ = 13934187786756.

The previous prime is 13934191519603. The next prime is 13934191519613. The reversal of 13934191519609 is 90691519143931.

The square root of 13934191519609 is 3732853.

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

13934191519609 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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., 9321266955625 + 4612924563984 = 3053075^2 + 2147772^2 .

It is a de Polignac number, because none of the positive numbers 2^k-13934191519609 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13934191519603) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 1866427 + ... + 5599279.

It is an arithmetic number, because the mean of its divisors is an integer number (4644731750821).

Almost surely, 2^{13934191519609} is an apocalyptic number.

13934191519609 is the 3732853-rd square number.

13934191519609 is the 1866427-th centered octagonal number.

It is an amenable number.

13934191519609 is a deficient number, since it is larger than the sum of its proper divisors (3732854).

13934191519609 is an frugal number, since it uses more digits than its factorization.

13934191519609 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7465706 (or 3732853 counting only the distinct ones).

The product of its (nonzero) digits is 7085880, while the sum is 61.

The spelling of 13934191519609 in words is "thirteen trillion, nine hundred thirty-four billion, one hundred ninety-one million, five hundred nineteen thousand, six hundred nine".