144218791 has 2 divisors, whose sum is σ = 144218792. Its totient is φ = 144218790.

The previous prime is 144218747. The next prime is 144218831. The reversal of 144218791 is 197812441.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-144218791 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 144218791.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (144218731) 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, 72109395 + 72109396.

It is an arithmetic number, because the mean of its divisors is an integer number (72109396).

Almost surely, 2^144218791 is an apocalyptic number.

144218791 is a deficient number, since it is larger than the sum of its proper divisors (1).

144218791 is an equidigital number, since it uses as much as digits as its factorization.

144218791 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 16128, while the sum is 37.

The square root of 144218791 is about 12009.1128315126. The cubic root of 144218791 is about 524.4136049869.

The spelling of 144218791 in words is "one hundred forty-four million, two hundred eighteen thousand, seven hundred ninety-one".