144561493 has 2 divisors, whose sum is σ = 144561494. Its totient is φ = 144561492.

The previous prime is 144561451. The next prime is 144561497. The reversal of 144561493 is 394165441.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 131033809 + 13527684 = 11447^2 + 3678^2 .

It is a cyclic number.

It is not a de Polignac number, because 144561493 - 2⁹ = 144560981 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (144561497) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 72280746 + 72280747.

It is an arithmetic number, because the mean of its divisors is an integer number (72280747).

Almost surely, 2^144561493 is an apocalyptic number.

It is an amenable number.

144561493 is a deficient number, since it is larger than the sum of its proper divisors (1).

144561493 is an equidigital number, since it uses as much as digits as its factorization.

144561493 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 51840, while the sum is 37.

The square root of 144561493 is about 12023.3727797153. The cubic root of 144561493 is about 524.8286582206.

The spelling of 144561493 in words is "one hundred forty-four million, five hundred sixty-one thousand, four hundred ninety-three".