2143873 has 2 divisors, whose sum is σ = 2143874. Its totient is φ = 2143872.

The previous prime is 2143861. The next prime is 2143877. The reversal of 2143873 is 3783412.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1723969 + 419904 = 1313^2 + 648^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2143873 is a prime.

2143873 is a lucky number.

It is not a weakly prime, because it can be changed into another prime (2143877) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1071936 + 1071937.

It is an arithmetic number, because the mean of its divisors is an integer number (1071937).

2^2143873 is an apocalyptic number.

It is an amenable number.

2143873 is a deficient number, since it is larger than the sum of its proper divisors (1).

2143873 is an equidigital number, since it uses as much as digits as its factorization.

2143873 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4032, while the sum is 28.

The square root of 2143873 is about 1464.1970495804. The cubic root of 2143873 is about 128.9435684508.

The spelling of 2143873 in words is "two million, one hundred forty-three thousand, eight hundred seventy-three".