144017809 has 4 divisors (see below), whose sum is σ = 155096116. Its totient is φ = 132939504.

The previous prime is 144017803. The next prime is 144017821. The reversal of 144017809 is 908710441.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 908710441 = 2113 ⋅430057.

It can be written as a sum of positive squares in 2 ways, for example, as 88887184 + 55130625 = 9428^2 + 7425^2 .

It is a cyclic number.

It is not a de Polignac number, because 144017809 - 2⁷ = 144017681 is a prime.

It is a super-2 number, since 2×144017809² = 41482258618320962, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (144017803) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5539134 + ... + 5539159.

It is an arithmetic number, because the mean of its divisors is an integer number (38774029).

Almost surely, 2^144017809 is an apocalyptic number.

It is an amenable number.

144017809 is a deficient number, since it is larger than the sum of its proper divisors (11078307).

144017809 is a wasteful number, since it uses less digits than its factorization.

144017809 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11078306.

The product of its (nonzero) digits is 8064, while the sum is 34.

The square root of 144017809 is about 12000.7420187253. The cubic root of 144017809 is about 524.1698857212.

The spelling of 144017809 in words is "one hundred forty-four million, seventeen thousand, eight hundred nine".