169135913 has 4 divisors (see below), whose sum is σ = 170810628. Its totient is φ = 167461200.

The previous prime is 169135909. The next prime is 169135921. The reversal of 169135913 is 319531961.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 319531961 = 7 ⋅45647423.

It can be written as a sum of positive squares in 2 ways, for example, as 97851664 + 71284249 = 9892^2 + 8443^2 .

It is a cyclic number.

It is not a de Polignac number, because 169135913 - 2² = 169135909 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (169135903) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 837206 + ... + 837407.

It is an arithmetic number, because the mean of its divisors is an integer number (42702657).

Almost surely, 2^169135913 is an apocalyptic number.

It is an amenable number.

169135913 is a deficient number, since it is larger than the sum of its proper divisors (1674715).

169135913 is a wasteful number, since it uses less digits than its factorization.

169135913 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1674714.

The product of its digits is 21870, while the sum is 38.

The square root of 169135913 is about 13005.2263725012. The cubic root of 169135913 is about 553.0256531672.

The spelling of 169135913 in words is "one hundred sixty-nine million, one hundred thirty-five thousand, nine hundred thirteen".