1443240013 has 4 divisors (see below), whose sum is σ = 1493006940. Its totient is φ = 1393473088.

The previous prime is 1443239989. The next prime is 1443240023. The reversal of 1443240013 is 3100423441.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3100423441 = 127 ⋅24412783.

It can be written as a sum of positive squares in 2 ways, for example, as 681314404 + 761925609 = 26102^2 + 27603^2 .

It is a cyclic number.

It is not a de Polignac number, because 1443240013 - 2¹³ = 1443231821 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1443240023) 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, 24883420 + ... + 24883477.

It is an arithmetic number, because the mean of its divisors is an integer number (373251735).

Almost surely, 2^1443240013 is an apocalyptic number.

It is an amenable number.

1443240013 is a deficient number, since it is larger than the sum of its proper divisors (49766927).

1443240013 is an equidigital number, since it uses as much as digits as its factorization.

1443240013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49766926.

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

The square root of 1443240013 is about 37989.9988549618. The cubic root of 1443240013 is about 1130.0895360698.

Adding to 1443240013 its reverse (3100423441), we get a palindrome (4543663454).

It can be divided in two parts, 14432 and 40013, that added together give a palindrome (54445).

The spelling of 1443240013 in words is "one billion, four hundred forty-three million, two hundred forty thousand, thirteen".