144845669 has 2 divisors, whose sum is σ = 144845670. Its totient is φ = 144845668.

The previous prime is 144845653. The next prime is 144845689. The reversal of 144845669 is 966548441.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 136072225 + 8773444 = 11665^2 + 2962^2 .

It is a cyclic number.

It is not a de Polignac number, because 144845669 - 2⁴ = 144845653 is a prime.

It is a super-2 number, since 2×144845669² = 41960535656115122, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (144845689) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 72422834 + 72422835.

It is an arithmetic number, because the mean of its divisors is an integer number (72422835).

Almost surely, 2^144845669 is an apocalyptic number.

It is an amenable number.

144845669 is a deficient number, since it is larger than the sum of its proper divisors (1).

144845669 is an equidigital number, since it uses as much as digits as its factorization.

144845669 is an evil number, because the sum of its binary digits is even.

The product of its digits is 829440, while the sum is 47.

The square root of 144845669 is about 12035.1846267517. The cubic root of 144845669 is about 525.1723322387.

The spelling of 144845669 in words is "one hundred forty-four million, eight hundred forty-five thousand, six hundred sixty-nine".