144220997 has 2 divisors, whose sum is σ = 144220998. Its totient is φ = 144220996.

The previous prime is 144220991. The next prime is 144221027. The reversal of 144220997 is 799022441.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 92179201 + 52041796 = 9601^2 + 7214^2 .

It is a cyclic number.

It is not a de Polignac number, because 144220997 - 2¹⁸ = 143958853 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 144220997.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (144220991) 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 as a sum of consecutive naturals, namely, 72110498 + 72110499.

It is an arithmetic number, because the mean of its divisors is an integer number (72110499).

Almost surely, 2^144220997 is an apocalyptic number.

It is an amenable number.

144220997 is a deficient number, since it is larger than the sum of its proper divisors (1).

144220997 is an equidigital number, since it uses as much as digits as its factorization.

144220997 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 36288, while the sum is 38.

The square root of 144220997 is about 12009.2046780792. The cubic root of 144220997 is about 524.4162788190.

The spelling of 144220997 in words is "one hundred forty-four million, two hundred twenty thousand, nine hundred ninety-seven".