13135939 has 4 divisors (see below), whose sum is σ = 13143256. Its totient is φ = 13128624.

The previous prime is 13135933. The next prime is 13135957. The reversal of 13135939 is 93953131.

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, and also an emirpimes, since its reverse is a distinct semiprime: 93953131 = 7351 ⋅12781.

It is a cyclic number.

It is not a de Polignac number, because 13135939 - 2³ = 13135931 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13135931) 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, 1087 + ... + 5239.

It is an arithmetic number, because the mean of its divisors is an integer number (3285814).

Almost surely, 2^13135939 is an apocalyptic number.

13135939 is a deficient number, since it is larger than the sum of its proper divisors (7317).

13135939 is an equidigital number, since it uses as much as digits as its factorization.

13135939 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7316.

The product of its digits is 10935, while the sum is 34.

The square root of 13135939 is about 3624.3535975398. The cubic root of 13135939 is about 235.9502133319.

The spelling of 13135939 in words is "thirteen million, one hundred thirty-five thousand, nine hundred thirty-nine".