144947717 has 2 divisors, whose sum is σ = 144947718. Its totient is φ = 144947716.

The previous prime is 144947689. The next prime is 144947749. The reversal of 144947717 is 717749441.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 95863681 + 49084036 = 9791^2 + 7006^2 .

It is an emirp because it is prime and its reverse (717749441) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 144947717 - 2⁶ = 144947653 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (144947617) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 72473858 + 72473859.

It is an arithmetic number, because the mean of its divisors is an integer number (72473859).

Almost surely, 2^144947717 is an apocalyptic number.

It is an amenable number.

144947717 is a deficient number, since it is larger than the sum of its proper divisors (1).

144947717 is an equidigital number, since it uses as much as digits as its factorization.

144947717 is an evil number, because the sum of its binary digits is even.

The product of its digits is 197568, while the sum is 44.

The square root of 144947717 is about 12039.4234496507. The cubic root of 144947717 is about 525.2956363632.

The spelling of 144947717 in words is "one hundred forty-four million, nine hundred forty-seven thousand, seven hundred seventeen".