144509861 has 2 divisors, whose sum is σ = 144509862. Its totient is φ = 144509860.

The previous prime is 144509837. The next prime is 144509887. The reversal of 144509861 is 168905441.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 99700225 + 44809636 = 9985^2 + 6694^2 .

It is a cyclic number.

It is not a de Polignac number, because 144509861 - 2⁶ = 144509797 is a prime.

It is a super-3 number, since 3×144509861³ (a number of 25 digits) contains 333 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (144509831) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 72254930 + 72254931.

It is an arithmetic number, because the mean of its divisors is an integer number (72254931).

Almost surely, 2^144509861 is an apocalyptic number.

It is an amenable number.

144509861 is a deficient number, since it is larger than the sum of its proper divisors (1).

144509861 is an equidigital number, since it uses as much as digits as its factorization.

144509861 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 34560, while the sum is 38.

The square root of 144509861 is about 12021.2254367015. The cubic root of 144509861 is about 524.7661676742.

The spelling of 144509861 in words is "one hundred forty-four million, five hundred nine thousand, eight hundred sixty-one".