144985817 has 2 divisors, whose sum is σ = 144985818. Its totient is φ = 144985816.

The previous prime is 144985801. The next prime is 144985831. The reversal of 144985817 is 718589441.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 142539721 + 2446096 = 11939^2 + 1564^2 .

It is a cyclic number.

It is not a de Polignac number, because 144985817 - 2⁴ = 144985801 is a prime.

It is not a weakly prime, because it can be changed into another prime (144985847) 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, 72492908 + 72492909.

It is an arithmetic number, because the mean of its divisors is an integer number (72492909).

Almost surely, 2^144985817 is an apocalyptic number.

It is an amenable number.

144985817 is a deficient number, since it is larger than the sum of its proper divisors (1).

144985817 is an equidigital number, since it uses as much as digits as its factorization.

144985817 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 322560, while the sum is 47.

The square root of 144985817 is about 12041.0056473702. The cubic root of 144985817 is about 525.3416575789.

The spelling of 144985817 in words is "one hundred forty-four million, nine hundred eighty-five thousand, eight hundred seventeen".