2144893909 has 2 divisors, whose sum is σ = 2144893910. Its totient is φ = 2144893908.

The previous prime is 2144893903. The next prime is 2144893913. The reversal of 2144893909 is 9093984412.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2067066225 + 77827684 = 45465^2 + 8822^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2144893909 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2144893903) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1072446954 + 1072446955.

It is an arithmetic number, because the mean of its divisors is an integer number (1072446955).

Almost surely, 2^2144893909 is an apocalyptic number.

It is an amenable number.

2144893909 is a deficient number, since it is larger than the sum of its proper divisors (1).

2144893909 is an equidigital number, since it uses as much as digits as its factorization.

2144893909 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 559872, while the sum is 49.

The square root of 2144893909 is about 46312.9993522337. Note that the first 3 decimals coincide. The cubic root of 2144893909 is about 1289.6403277863.

The spelling of 2144893909 in words is "two billion, one hundred forty-four million, eight hundred ninety-three thousand, nine hundred nine".