144988513 has 4 divisors (see below), whose sum is σ = 145015828. Its totient is φ = 144961200.

The previous prime is 144988483. The next prime is 144988577. The reversal of 144988513 is 315889441.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 315889441 = 7 ⋅45127063.

It can be written as a sum of positive squares in 2 ways, for example, as 86266944 + 58721569 = 9288^2 + 7663^2 .

It is a cyclic number.

It is not a de Polignac number, because 144988513 - 2¹³ = 144980321 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 144988513.

It is not an unprimeable number, because it can be changed into a prime (144988583) 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, 2838 + ... + 17263.

It is an arithmetic number, because the mean of its divisors is an integer number (36253957).

Almost surely, 2^144988513 is an apocalyptic number.

It is an amenable number.

144988513 is a deficient number, since it is larger than the sum of its proper divisors (27315).

144988513 is an equidigital number, since it uses as much as digits as its factorization.

144988513 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27314.

The product of its digits is 138240, while the sum is 43.

The square root of 144988513 is about 12041.1175976319. The cubic root of 144988513 is about 525.3449137878.

The spelling of 144988513 in words is "one hundred forty-four million, nine hundred eighty-eight thousand, five hundred thirteen".