13135869 has 12 divisors (see below), whose sum is σ = 19628700. Its totient is φ = 8455104.

The previous prime is 13135861. The next prime is 13135873. The reversal of 13135869 is 96853131.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 2442969 + 10692900 = 1563^2 + 3270^2 .

It is not a de Polignac number, because 13135869 - 2³ = 13135861 is a prime.

It is a super-2 number, since 2×13135869² = 345102108770322, which contains 22 as substring.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13135861) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 24904 + ... + 25425.

It is an arithmetic number, because the mean of its divisors is an integer number (1635725).

Almost surely, 2^13135869 is an apocalyptic number.

It is an amenable number.

13135869 is a deficient number, since it is larger than the sum of its proper divisors (6492831).

13135869 is a wasteful number, since it uses less digits than its factorization.

13135869 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50364 (or 50361 counting only the distinct ones).

The product of its digits is 19440, while the sum is 36.

The square root of 13135869 is about 3624.3439406326. The cubic root of 13135869 is about 235.9497942134.

The spelling of 13135869 in words is "thirteen million, one hundred thirty-five thousand, eight hundred sixty-nine".