13539663097 has 4 divisors (see below), whose sum is σ = 13540058980. Its totient is φ = 13539267216.

The previous prime is 13539663091. The next prime is 13539663119. The reversal of 13539663097 is 79036693531.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 79036693531 = 27017 ⋅2925443.

It can be written as a sum of positive squares in 2 ways, for example, as 756195001 + 12783468096 = 27499^2 + 113064^2 .

It is a cyclic number.

It is not a de Polignac number, because 13539663097 - 2¹¹ = 13539661049 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13539663091) 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 3 ways as a sum of consecutive naturals, for example, 141222 + ... + 216847.

It is an arithmetic number, because the mean of its divisors is an integer number (3385014745).

Almost surely, 2^13539663097 is an apocalyptic number.

It is an amenable number.

13539663097 is a deficient number, since it is larger than the sum of its proper divisors (395883).

13539663097 is an equidigital number, since it uses as much as digits as its factorization.

13539663097 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 395882.

The product of its (nonzero) digits is 2755620, while the sum is 52.

The spelling of 13539663097 in words is "thirteen billion, five hundred thirty-nine million, six hundred sixty-three thousand, ninety-seven".