144694213 has 2 divisors, whose sum is σ = 144694214. Its totient is φ = 144694212.

The previous prime is 144694201. The next prime is 144694243. The reversal of 144694213 is 312496441.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 137522529 + 7171684 = 11727^2 + 2678^2 .

It is an emirp because it is prime and its reverse (312496441) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 144694213 - 2⁵ = 144694181 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (144694243) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 72347106 + 72347107.

It is an arithmetic number, because the mean of its divisors is an integer number (72347107).

Almost surely, 2^144694213 is an apocalyptic number.

It is an amenable number.

144694213 is a deficient number, since it is larger than the sum of its proper divisors (1).

144694213 is an equidigital number, since it uses as much as digits as its factorization.

144694213 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 20736, while the sum is 34.

The square root of 144694213 is about 12028.8907634910. The cubic root of 144694213 is about 524.9892218498.

It can be divided in two parts, 1446 and 94213, that added together give a palindrome (95659).

The spelling of 144694213 in words is "one hundred forty-four million, six hundred ninety-four thousand, two hundred thirteen".