144809613 has 40 divisors (see below), whose sum is σ = 235215288. Its totient is φ = 88252416.

The previous prime is 144809611. The next prime is 144809617. The reversal of 144809613 is 316908441.

It can be written as a sum of positive squares in 4 ways, for example, as 6441444 + 138368169 = 2538^2 + 11763^2 .

It is not a de Polignac number, because 144809613 - 2¹ = 144809611 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (144809611) 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 in 39 ways as a sum of consecutive naturals, for example, 118381 + ... + 119597.

Almost surely, 2^144809613 is an apocalyptic number.

144809613 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

144809613 is a deficient number, since it is larger than the sum of its proper divisors (90405675).

144809613 is a wasteful number, since it uses less digits than its factorization.

144809613 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1355 (or 1346 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 36.

The square root of 144809613 is about 12033.6865922293. The cubic root of 144809613 is about 525.1287520955.

The spelling of 144809613 in words is "one hundred forty-four million, eight hundred nine thousand, six hundred thirteen".