1144664399 has 2 divisors, whose sum is σ = 1144664400. Its totient is φ = 1144664398.

The previous prime is 1144664393. The next prime is 1144664401. The reversal of 1144664399 is 9934664411.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1144664399 is a prime.

Together with 1144664401, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1144664393) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 572332199 + 572332200.

It is an arithmetic number, because the mean of its divisors is an integer number (572332200).

Almost surely, 2^1144664399 is an apocalyptic number.

1144664399 is a deficient number, since it is larger than the sum of its proper divisors (1).

1144664399 is an equidigital number, since it uses as much as digits as its factorization.

1144664399 is an evil number, because the sum of its binary digits is even.

The product of its digits is 559872, while the sum is 47.

The square root of 1144664399 is about 33832.8893090732. The cubic root of 1144664399 is about 1046.0667354663.

The spelling of 1144664399 in words is "one billion, one hundred forty-four million, six hundred sixty-four thousand, three hundred ninety-nine".