13135843 has 4 divisors (see below), whose sum is σ = 15012400. Its totient is φ = 11259288.

The previous prime is 13135823. The next prime is 13135861. The reversal of 13135843 is 34853131.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 34853131 = 239 ⋅145829.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13135843 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13135813) 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, 938268 + ... + 938281.

It is an arithmetic number, because the mean of its divisors is an integer number (3753100).

Almost surely, 2^13135843 is an apocalyptic number.

13135843 is a deficient number, since it is larger than the sum of its proper divisors (1876557).

13135843 is an equidigital number, since it uses as much as digits as its factorization.

13135843 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1876556.

The product of its digits is 4320, while the sum is 28.

The square root of 13135843 is about 3624.3403537747. The cubic root of 13135843 is about 235.9496385404.

Adding to 13135843 its reverse (34853131), we get a palindrome (47988974).

The spelling of 13135843 in words is "thirteen million, one hundred thirty-five thousand, eight hundred forty-three".