1144644863 has 2 divisors, whose sum is σ = 1144644864. Its totient is φ = 1144644862.

The previous prime is 1144644859. The next prime is 1144644881. The reversal of 1144644863 is 3684464411.

It is a weak prime.

It is an emirp because it is prime and its reverse (3684464411) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1144644863 - 2² = 1144644859 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1144644863.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1144644883) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 572322431 + 572322432.

It is an arithmetic number, because the mean of its divisors is an integer number (572322432).

Almost surely, 2^1144644863 is an apocalyptic number.

1144644863 is a deficient number, since it is larger than the sum of its proper divisors (1).

1144644863 is an equidigital number, since it uses as much as digits as its factorization.

1144644863 is an evil number, because the sum of its binary digits is even.

The product of its digits is 221184, while the sum is 41.

The square root of 1144644863 is about 33832.6005946927. The cubic root of 1144644863 is about 1046.0607843549.

The spelling of 1144644863 in words is "one billion, one hundred forty-four million, six hundred forty-four thousand, eight hundred sixty-three".