144648661 has 2 divisors, whose sum is σ = 144648662. Its totient is φ = 144648660.

The previous prime is 144648649. The next prime is 144648667. The reversal of 144648661 is 166846441.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 139381636 + 5267025 = 11806^2 + 2295^2 .

It is a cyclic number.

It is not a de Polignac number, because 144648661 - 2¹³ = 144640469 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (144648667) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 72324330 + 72324331.

It is an arithmetic number, because the mean of its divisors is an integer number (72324331).

Almost surely, 2^144648661 is an apocalyptic number.

It is an amenable number.

144648661 is a deficient number, since it is larger than the sum of its proper divisors (1).

144648661 is an equidigital number, since it uses as much as digits as its factorization.

144648661 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 110592, while the sum is 40.

The square root of 144648661 is about 12026.9971730270. The cubic root of 144648661 is about 524.9341244631.

The spelling of 144648661 in words is "one hundred forty-four million, six hundred forty-eight thousand, six hundred sixty-one".