144672217 has 2 divisors, whose sum is σ = 144672218. Its totient is φ = 144672216.

The previous prime is 144672191. The next prime is 144672287. The reversal of 144672217 is 712276441.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 97831881 + 46840336 = 9891^2 + 6844^2 .

It is a cyclic number.

It is not a de Polignac number, because 144672217 - 2⁷ = 144672089 is a prime.

It is not a weakly prime, because it can be changed into another prime (144672287) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 72336108 + 72336109.

It is an arithmetic number, because the mean of its divisors is an integer number (72336109).

Almost surely, 2^144672217 is an apocalyptic number.

It is an amenable number.

144672217 is a deficient number, since it is larger than the sum of its proper divisors (1).

144672217 is an equidigital number, since it uses as much as digits as its factorization.

144672217 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 18816, while the sum is 34.

The square root of 144672217 is about 12027.9764299736. The cubic root of 144672217 is about 524.9626180488.

The spelling of 144672217 in words is "one hundred forty-four million, six hundred seventy-two thousand, two hundred seventeen".