1244320313 has 8 divisors (see below), whose sum is σ = 1302739200. Its totient is φ = 1186935568.

The previous prime is 1244320291. The next prime is 1244320339. The reversal of 1244320313 is 3130234421.

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

It is a cyclic number.

It is not a de Polignac number, because 1244320313 - 2¹⁰ = 1244319289 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1244320373) 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, 256073 + ... + 260886.

It is an arithmetic number, because the mean of its divisors is an integer number (162842400).

Almost surely, 2^1244320313 is an apocalyptic number.

It is an amenable number.

1244320313 is a deficient number, since it is larger than the sum of its proper divisors (58418887).

1244320313 is an equidigital number, since it uses as much as digits as its factorization.

1244320313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 517071.

The product of its (nonzero) digits is 1728, while the sum is 23.

The square root of 1244320313 is about 35274.9247058020. The cubic root of 1244320313 is about 1075.5833323697.

Adding to 1244320313 its reverse (3130234421), we get a palindrome (4374554734).

The spelling of 1244320313 in words is "one billion, two hundred forty-four million, three hundred twenty thousand, three hundred thirteen".