1316444321 has 4 divisors (see below), whose sum is σ = 1318783152. Its totient is φ = 1314105492.

The previous prime is 1316444309. The next prime is 1316444333. The reversal of 1316444321 is 1234446131.

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.

It is an interprime number because it is at equal distance from previous prime (1316444309) and next prime (1316444333).

It is a cyclic number.

It is not a de Polignac number, because 1316444321 - 2³⁰ = 242702497 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1316344321) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1168571 + ... + 1169696.

It is an arithmetic number, because the mean of its divisors is an integer number (329695788).

Almost surely, 2^1316444321 is an apocalyptic number.

It is an amenable number.

1316444321 is a deficient number, since it is larger than the sum of its proper divisors (2338831).

1316444321 is an equidigital number, since it uses as much as digits as its factorization.

1316444321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2338830.

The product of its digits is 6912, while the sum is 29.

The square root of 1316444321 is about 36282.8378300265. The cubic root of 1316444321 is about 1095.9754645905.

The spelling of 1316444321 in words is "one billion, three hundred sixteen million, four hundred forty-four thousand, three hundred twenty-one".