13243307137 has 4 divisors (see below), whose sum is σ = 13247218260. Its totient is φ = 13239396016.

The previous prime is 13243307113. The next prime is 13243307221. The reversal of 13243307137 is 73170334231.

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 8229392656 + 5013914481 = 90716^2 + 70809^2 .

It is a cyclic number.

It is not a de Polignac number, because 13243307137 - 2³¹ = 11095823489 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13243307537) 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, 1950478 + ... + 1957255.

It is an arithmetic number, because the mean of its divisors is an integer number (3311804565).

Almost surely, 2^13243307137 is an apocalyptic number.

It is an amenable number.

13243307137 is a deficient number, since it is larger than the sum of its proper divisors (3911123).

13243307137 is an equidigital number, since it uses as much as digits as its factorization.

13243307137 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3911122.

The product of its (nonzero) digits is 31752, while the sum is 34.

The spelling of 13243307137 in words is "thirteen billion, two hundred forty-three million, three hundred seven thousand, one hundred thirty-seven".