169189445 has 8 divisors (see below), whose sum is σ = 205309080. Its totient is φ = 133830400.

The previous prime is 169189439. The next prime is 169189453. The reversal of 169189445 is 544981961.

It can be written as a sum of positive squares in 4 ways, for example, as 7396 + 169182049 = 86^2 + 13007^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 169189445 - 2⁴ = 169189429 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 169189445.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 189656 + ... + 190545.

It is an arithmetic number, because the mean of its divisors is an integer number (25663635).

Almost surely, 2^169189445 is an apocalyptic number.

It is an amenable number.

169189445 is a deficient number, since it is larger than the sum of its proper divisors (36119635).

169189445 is an equidigital number, since it uses as much as digits as its factorization.

169189445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 380295.

The product of its digits is 311040, while the sum is 47.

The square root of 169189445 is about 13007.2843053421. The cubic root of 169189445 is about 553.0839917463.

The spelling of 169189445 in words is "one hundred sixty-nine million, one hundred eighty-nine thousand, four hundred forty-five".