169309345 has 4 divisors (see below), whose sum is σ = 203171220. Its totient is φ = 135447472.

The previous prime is 169309339. The next prime is 169309351. The reversal of 169309345 is 543903961.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 543903961 = 29 ⋅18755309.

It is an interprime number because it is at equal distance from previous prime (169309339) and next prime (169309351).

It can be written as a sum of positive squares in 2 ways, for example, as 41370624 + 127938721 = 6432^2 + 11311^2 .

It is a cyclic number.

It is not a de Polignac number, because 169309345 - 2⁹ = 169308833 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 169309298 and 169309307.

It is an unprimeable number.

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, 16930930 + ... + 16930939.

It is an arithmetic number, because the mean of its divisors is an integer number (50792805).

Almost surely, 2^169309345 is an apocalyptic number.

It is an amenable number.

169309345 is a deficient number, since it is larger than the sum of its proper divisors (33861875).

169309345 is an equidigital number, since it uses as much as digits as its factorization.

169309345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33861874.

The product of its (nonzero) digits is 87480, while the sum is 40.

The square root of 169309345 is about 13011.8924449905. The cubic root of 169309345 is about 553.2146128017.

The spelling of 169309345 in words is "one hundred sixty-nine million, three hundred nine thousand, three hundred forty-five".