1144643971 has 2 divisors, whose sum is σ = 1144643972. Its totient is φ = 1144643970.

The previous prime is 1144643963. The next prime is 1144644019. The reversal of 1144643971 is 1793464411.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1144643971 - 2³ = 1144643963 is a prime.

It is not a weakly prime, because it can be changed into another prime (1144643471) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 572321985 + 572321986.

It is an arithmetic number, because the mean of its divisors is an integer number (572321986).

Almost surely, 2^1144643971 is an apocalyptic number.

1144643971 is a deficient number, since it is larger than the sum of its proper divisors (1).

1144643971 is an equidigital number, since it uses as much as digits as its factorization.

1144643971 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 72576, while the sum is 40.

The square root of 1144643971 is about 33832.5874121386. The cubic root of 1144643971 is about 1046.0605126297.

The spelling of 1144643971 in words is "one billion, one hundred forty-four million, six hundred forty-three thousand, nine hundred seventy-one".