1243444423 has 16 divisors (see below), whose sum is σ = 1410171840. Its totient is φ = 1087789824.

The previous prime is 1243444421. The next prime is 1243444451. The reversal of 1243444423 is 3244443421.

It is a cyclic number.

It is not a de Polignac number, because 1243444423 - 2¹ = 1243444421 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 (1243444421) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13515 + ... + 51667.

It is an arithmetic number, because the mean of its divisors is an integer number (88135740).

Almost surely, 2^1243444423 is an apocalyptic number.

1243444423 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

1243444423 is a deficient number, since it is larger than the sum of its proper divisors (166727417).

1243444423 is a wasteful number, since it uses less digits than its factorization.

1243444423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38298.

The product of its digits is 36864, while the sum is 31.

The square root of 1243444423 is about 35262.5073271882. The cubic root of 1243444423 is about 1075.3309017024.

Adding to 1243444423 its reverse (3244443421), we get a palindrome (4487887844).

The spelling of 1243444423 in words is "one billion, two hundred forty-three million, four hundred forty-four thousand, four hundred twenty-three".