1144664321 has 4 divisors (see below), whose sum is σ = 1145844144. Its totient is φ = 1143484500.

The previous prime is 1144664317. The next prime is 1144664327. The reversal of 1144664321 is 1234664411.

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 a cyclic number.

It is not a de Polignac number, because 1144664321 - 2² = 1144664317 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1144664327) 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, 588455 + ... + 590396.

It is an arithmetic number, because the mean of its divisors is an integer number (286461036).

Almost surely, 2^1144664321 is an apocalyptic number.

It is an amenable number.

1144664321 is a deficient number, since it is larger than the sum of its proper divisors (1179823).

1144664321 is an equidigital number, since it uses as much as digits as its factorization.

1144664321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1179822.

The product of its digits is 13824, while the sum is 32.

The square root of 1144664321 is about 33832.8881563487. Note that the first 3 decimals coincide. The cubic root of 1144664321 is about 1046.0667117058.

The spelling of 1144664321 in words is "one billion, one hundred forty-four million, six hundred sixty-four thousand, three hundred twenty-one".