144435013 has 4 divisors (see below), whose sum is σ = 148338700. Its totient is φ = 140531328.

The previous prime is 144435001. The next prime is 144435019. The reversal of 144435013 is 310534441.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 310534441 = 7 ⋅44362063.

It can be written as a sum of positive squares in 2 ways, for example, as 135326689 + 9108324 = 11633^2 + 3018^2 .

It is not a de Polignac number, because 144435013 - 2⁵ = 144434981 is a prime.

It is a super-3 number, since 3×144435013³ (a number of 25 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (144435019) 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, 1951788 + ... + 1951861.

It is an arithmetic number, because the mean of its divisors is an integer number (37084675).

Almost surely, 2^144435013 is an apocalyptic number.

It is an amenable number.

144435013 is a deficient number, since it is larger than the sum of its proper divisors (3903687).

144435013 is an equidigital number, since it uses as much as digits as its factorization.

144435013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3903686.

The product of its (nonzero) digits is 2880, while the sum is 25.

The square root of 144435013 is about 12018.1118733352. Note that the first 3 decimals coincide. The cubic root of 144435013 is about 524.6755522172.

Adding to 144435013 its reverse (310534441), we get a palindrome (454969454).

The spelling of 144435013 in words is "one hundred forty-four million, four hundred thirty-five thousand, thirteen".