1443720243 has 8 divisors (see below), whose sum is σ = 2199954688. Its totient is φ = 824982984.

The previous prime is 1443720241. The next prime is 1443720247. The reversal of 1443720243 is 3420273441.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1443720243 - 2¹ = 1443720241 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1443720243.

It is not an unprimeable number, because it can be changed into a prime (1443720241) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 34374271 + ... + 34374312.

It is an arithmetic number, because the mean of its divisors is an integer number (274994336).

Almost surely, 2^1443720243 is an apocalyptic number.

1443720243 is a deficient number, since it is larger than the sum of its proper divisors (756234445).

1443720243 is an equidigital number, since it uses as much as digits as its factorization.

1443720243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68748593.

The product of its (nonzero) digits is 16128, while the sum is 30.

The square root of 1443720243 is about 37996.3188085372. The cubic root of 1443720243 is about 1130.2148658164.

Adding to 1443720243 its reverse (3420273441), we get a palindrome (4863993684).

The spelling of 1443720243 in words is "one billion, four hundred forty-three million, seven hundred twenty thousand, two hundred forty-three".