144420313 has 4 divisors (see below), whose sum is σ = 145745380. Its totient is φ = 143095248.

The previous prime is 144420307. The next prime is 144420329. The reversal of 144420313 is 313024441.

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 113806224 + 30614089 = 10668^2 + 5533^2 .

It is a cyclic number.

It is not a de Polignac number, because 144420313 - 2⁹ = 144419801 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (144420343) 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, 662370 + ... + 662587.

It is an arithmetic number, because the mean of its divisors is an integer number (36436345).

Almost surely, 2^144420313 is an apocalyptic number.

It is an amenable number.

144420313 is a deficient number, since it is larger than the sum of its proper divisors (1325067).

144420313 is a wasteful number, since it uses less digits than its factorization.

144420313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1325066.

The product of its (nonzero) digits is 1152, while the sum is 22.

The square root of 144420313 is about 12017.5002808404. The cubic root of 144420313 is about 524.6577518420.

Adding to 144420313 its reverse (313024441), we get a palindrome (457444754).

The spelling of 144420313 in words is "one hundred forty-four million, four hundred twenty thousand, three hundred thirteen".