169255913 has 4 divisors (see below), whose sum is σ = 173384148. Its totient is φ = 165127680.

The previous prime is 169255909. The next prime is 169255921. The reversal of 169255913 is 319552961.

It is a happy number.

169255913 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 28430224 + 140825689 = 5332^2 + 11867^2 .

It is a cyclic number.

It is not a de Polignac number, because 169255913 - 2² = 169255909 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (41), and also a Moran number because the ratio is a prime number: 4128193 = 169255913 / (1 + 6 + 9 + 2 + 5 + 5 + 9 + 1 + 3).

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (169255903) 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, 2064056 + ... + 2064137.

It is an arithmetic number, because the mean of its divisors is an integer number (43346037).

Almost surely, 2^169255913 is an apocalyptic number.

It is an amenable number.

169255913 is a deficient number, since it is larger than the sum of its proper divisors (4128235).

169255913 is an equidigital number, since it uses as much as digits as its factorization.

169255913 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4128234.

The product of its digits is 72900, while the sum is 41.

The square root of 169255913 is about 13009.8390843238. The cubic root of 169255913 is about 553.1564107116.

The spelling of 169255913 in words is "one hundred sixty-nine million, two hundred fifty-five thousand, nine hundred thirteen".