144535709 has 4 divisors (see below), whose sum is σ = 144664860. Its totient is φ = 144406560.

The previous prime is 144535631. The next prime is 144535711. The reversal of 144535709 is 907535441.

144535709 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 907535441 = 5237 ⋅173293.

It can be written as a sum of positive squares in 2 ways, for example, as 11710084 + 132825625 = 3422^2 + 11525^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-144535709 is a prime.

It is a super-2 number, since 2×144535709² = 41781142352265362, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (144535759) 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, 62882 + ... + 65139.

It is an arithmetic number, because the mean of its divisors is an integer number (36166215).

Almost surely, 2^144535709 is an apocalyptic number.

It is an amenable number.

144535709 is a deficient number, since it is larger than the sum of its proper divisors (129151).

144535709 is a wasteful number, since it uses less digits than its factorization.

144535709 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 129150.

The product of its (nonzero) digits is 75600, while the sum is 38.

The square root of 144535709 is about 12022.3004870116. The cubic root of 144535709 is about 524.7974535375.

The spelling of 144535709 in words is "one hundred forty-four million, five hundred thirty-five thousand, seven hundred nine".