144784417 has 2 divisors, whose sum is σ = 144784418. Its totient is φ = 144784416.

The previous prime is 144784411. The next prime is 144784429. The reversal of 144784417 is 714487441.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 89415936 + 55368481 = 9456^2 + 7441^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-144784417 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 144784417.

It is not a weakly prime, because it can be changed into another prime (144784411) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 72392208 + 72392209.

It is an arithmetic number, because the mean of its divisors is an integer number (72392209).

Almost surely, 2^144784417 is an apocalyptic number.

It is an amenable number.

144784417 is a deficient number, since it is larger than the sum of its proper divisors (1).

144784417 is an equidigital number, since it uses as much as digits as its factorization.

144784417 is an evil number, because the sum of its binary digits is even.

The product of its digits is 100352, while the sum is 40.

The square root of 144784417 is about 12032.6396522126. The cubic root of 144784417 is about 525.0982939161.

The spelling of 144784417 in words is "one hundred forty-four million, seven hundred eighty-four thousand, four hundred seventeen".