144539513 has 4 divisors (see below), whose sum is σ = 144716388. Its totient is φ = 144362640.

The previous prime is 144539459. The next prime is 144539519. The reversal of 144539513 is 315935441.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 76510009 + 68029504 = 8747^2 + 8248^2 .

It is a cyclic number.

It is not a de Polignac number, because 144539513 - 2⁶ = 144539449 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (144539519) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 87206 + ... + 88847.

It is an arithmetic number, because the mean of its divisors is an integer number (36179097).

Almost surely, 2^144539513 is an apocalyptic number.

It is an amenable number.

144539513 is a deficient number, since it is larger than the sum of its proper divisors (176875).

144539513 is an equidigital number, since it uses as much as digits as its factorization.

144539513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 176874.

The product of its digits is 32400, while the sum is 35.

The square root of 144539513 is about 12022.4586919648. The cubic root of 144539513 is about 524.8020575024.

The spelling of 144539513 in words is "one hundred forty-four million, five hundred thirty-nine thousand, five hundred thirteen".