1144321999 has 2 divisors, whose sum is σ = 1144322000. Its totient is φ = 1144321998.

The previous prime is 1144321961. The next prime is 1144322017. The reversal of 1144321999 is 9991234411.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1144321999 - 2²¹ = 1142224847 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1144321099) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 572160999 + 572161000.

It is an arithmetic number, because the mean of its divisors is an integer number (572161000).

Almost surely, 2^1144321999 is an apocalyptic number.

1144321999 is a deficient number, since it is larger than the sum of its proper divisors (1).

1144321999 is an equidigital number, since it uses as much as digits as its factorization.

1144321999 is an evil number, because the sum of its binary digits is even.

The product of its digits is 69984, while the sum is 43.

The square root of 1144321999 is about 33827.8287656775. The cubic root of 1144321999 is about 1045.9624228050.

The spelling of 1144321999 in words is "one billion, one hundred forty-four million, three hundred twenty-one thousand, nine hundred ninety-nine".