144199969 has 2 divisors, whose sum is σ = 144199970. Its totient is φ = 144199968.

The previous prime is 144199921. The next prime is 144199973. The reversal of 144199969 is 969991441.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 116899344 + 27300625 = 10812^2 + 5225^2 .

It is an emirp because it is prime and its reverse (969991441) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 144199969 - 2¹⁹ = 143675681 is a prime.

It is a super-2 number, since 2×144199969² = 41587262119201922, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (144199169) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 72099984 + 72099985.

It is an arithmetic number, because the mean of its divisors is an integer number (72099985).

Almost surely, 2^144199969 is an apocalyptic number.

It is an amenable number.

144199969 is a deficient number, since it is larger than the sum of its proper divisors (1).

144199969 is an equidigital number, since it uses as much as digits as its factorization.

144199969 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 629856, while the sum is 52.

The square root of 144199969 is about 12008.3291510518. The cubic root of 144199969 is about 524.3907902477.

The spelling of 144199969 in words is "one hundred forty-four million, one hundred ninety-nine thousand, nine hundred sixty-nine".