1144020313 has 4 divisors (see below), whose sum is σ = 1145612160. Its totient is φ = 1142428468.

The previous prime is 1144020277. The next prime is 1144020323. The reversal of 1144020313 is 3130204411.

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: 3130204411 = 49633 ⋅63067.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1144020313 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1144020323) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 794845 + ... + 796282.

It is an arithmetic number, because the mean of its divisors is an integer number (286403040).

Almost surely, 2^1144020313 is an apocalyptic number.

It is an amenable number.

1144020313 is a deficient number, since it is larger than the sum of its proper divisors (1591847).

1144020313 is an equidigital number, since it uses as much as digits as its factorization.

1144020313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1591846.

The product of its (nonzero) digits is 288, while the sum is 19.

The square root of 1144020313 is about 33823.3693324601. The cubic root of 1144020313 is about 1045.8704964782.

Adding to 1144020313 its reverse (3130204411), we get a palindrome (4274224724).

The spelling of 1144020313 in words is "one billion, one hundred forty-four million, twenty thousand, three hundred thirteen".