144757661 has 2 divisors, whose sum is σ = 144757662. Its totient is φ = 144757660.

The previous prime is 144757619. The next prime is 144757663. The reversal of 144757661 is 166757441.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 130393561 + 14364100 = 11419^2 + 3790^2 .

It is an emirp because it is prime and its reverse (166757441) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 144757661 - 2⁶ = 144757597 is a prime.

Together with 144757663, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (144757663) 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, 72378830 + 72378831.

It is an arithmetic number, because the mean of its divisors is an integer number (72378831).

Almost surely, 2^144757661 is an apocalyptic number.

It is an amenable number.

144757661 is a deficient number, since it is larger than the sum of its proper divisors (1).

144757661 is an equidigital number, since it uses as much as digits as its factorization.

144757661 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 141120, while the sum is 41.

The square root of 144757661 is about 12031.5277915982. The cubic root of 144757661 is about 525.0659460622.

The spelling of 144757661 in words is "one hundred forty-four million, seven hundred fifty-seven thousand, six hundred sixty-one".