4144331993 has 4 divisors (see below), whose sum is σ = 4144990080. Its totient is φ = 4143673908.

The previous prime is 4144331987. The next prime is 4144332067. The reversal of 4144331993 is 3991334414.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 3991334414 = 2 ⋅1995667207.

It is a cyclic number.

It is not a de Polignac number, because 4144331993 - 2¹² = 4144327897 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 4144331993.

It is not an unprimeable number, because it can be changed into a prime (4144331923) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 319505 + ... + 332222.

It is an arithmetic number, because the mean of its divisors is an integer number (1036247520).

Almost surely, 2^4144331993 is an apocalyptic number.

It is an amenable number.

4144331993 is a deficient number, since it is larger than the sum of its proper divisors (658087).

4144331993 is an equidigital number, since it uses as much as digits as its factorization.

4144331993 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 658086.

The product of its digits is 139968, while the sum is 41.

The square root of 4144331993 is about 64376.4863362393. The cubic root of 4144331993 is about 1606.2686363051.

The spelling of 4144331993 in words is "four billion, one hundred forty-four million, three hundred thirty-one thousand, nine hundred ninety-three".