144640609 has 2 divisors, whose sum is σ = 144640610. Its totient is φ = 144640608.

The previous prime is 144640549. The next prime is 144640621. The reversal of 144640609 is 906046441.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 111830625 + 32809984 = 10575^2 + 5728^2 .

It is a cyclic number.

It is not a de Polignac number, because 144640609 - 2¹³ = 144632417 is a prime.

It is not a weakly prime, because it can be changed into another prime (144640669) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 72320304 + 72320305.

It is an arithmetic number, because the mean of its divisors is an integer number (72320305).

Almost surely, 2^144640609 is an apocalyptic number.

It is an amenable number.

144640609 is a deficient number, since it is larger than the sum of its proper divisors (1).

144640609 is an equidigital number, since it uses as much as digits as its factorization.

144640609 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 20736, while the sum is 34.

The square root of 144640609 is about 12026.6624214701. The cubic root of 144640609 is about 524.9243839697.

The spelling of 144640609 in words is "one hundred forty-four million, six hundred forty thousand, six hundred nine".