144268209 has 10 divisors (see below), whose sum is σ = 215511890. Its totient is φ = 96178752.

The previous prime is 144268183. The next prime is 144268211. The reversal of 144268209 is 902862441.

144268209 is a `hidden beast` number, since 1 + 442 + 6 + 8 + 209 = 666.

144268209 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 138579984 + 5688225 = 11772^2 + 2385^2 .

It is not a de Polignac number, because 144268209 - 2⁵ = 144268177 is a prime.

It is a super-2 number, since 2×144268209² = 41626632256135362, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (144268249) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 890464 + ... + 890625.

It is an arithmetic number, because the mean of its divisors is an integer number (21551189).

Almost surely, 2^144268209 is an apocalyptic number.

It is an amenable number.

144268209 is a deficient number, since it is larger than the sum of its proper divisors (71243681).

144268209 is an equidigital number, since it uses as much as digits as its factorization.

144268209 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1781101 (or 1781092 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 36.

The square root of 144268209 is about 12011.1701761319. The cubic root of 144268209 is about 524.4734966553.

The spelling of 144268209 in words is "one hundred forty-four million, two hundred sixty-eight thousand, two hundred nine".