144969169 has 4 divisors (see below), whose sum is σ = 146252196. Its totient is φ = 143686144.

The previous prime is 144969157. The next prime is 144969199. The reversal of 144969169 is 961969441.

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 2286144 + 142683025 = 1512^2 + 11945^2 .

It is a cyclic number.

It is not a de Polignac number, because 144969169 - 2¹⁵ = 144936401 is a prime.

It is a super-2 number, since 2×144969169² = 42032119921101122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (144969109) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 641344 + ... + 641569.

It is an arithmetic number, because the mean of its divisors is an integer number (36563049).

Almost surely, 2^144969169 is an apocalyptic number.

It is an amenable number.

144969169 is a deficient number, since it is larger than the sum of its proper divisors (1283027).

144969169 is a wasteful number, since it uses less digits than its factorization.

144969169 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1283026.

The product of its digits is 419904, while the sum is 49.

The square root of 144969169 is about 12040.3143231396. The cubic root of 144969169 is about 525.3215493530.

The spelling of 144969169 in words is "one hundred forty-four million, nine hundred sixty-nine thousand, one hundred sixty-nine".