144421969 has 2 divisors, whose sum is σ = 144421970. Its totient is φ = 144421968.

The previous prime is 144421961. The next prime is 144422009. The reversal of 144421969 is 969124441.

It is an a-pointer prime, because the next prime (144422009) can be obtained adding 144421969 to its sum of digits (40).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 141491025 + 2930944 = 11895^2 + 1712^2 .

It is an emirp because it is prime and its reverse (969124441) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 144421969 - 2³ = 144421961 is a prime.

It is a super-2 number, since 2×144421969² = 41715410259673922, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (144421961) 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, 72210984 + 72210985.

It is an arithmetic number, because the mean of its divisors is an integer number (72210985).

Almost surely, 2^144421969 is an apocalyptic number.

It is an amenable number.

144421969 is a deficient number, since it is larger than the sum of its proper divisors (1).

144421969 is an equidigital number, since it uses as much as digits as its factorization.

144421969 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 62208, while the sum is 40.

The square root of 144421969 is about 12017.5691801629. The cubic root of 144421969 is about 524.6597571691.

The spelling of 144421969 in words is "one hundred forty-four million, four hundred twenty-one thousand, nine hundred sixty-nine".