2173643 has 2 divisors, whose sum is σ = 2173644. Its totient is φ = 2173642.

The previous prime is 2173601. The next prime is 2173649. The reversal of 2173643 is 3463712.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2173643 - 2⁸ = 2173387 is a prime.

It is not a weakly prime, because it can be changed into another prime (2173649) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1086821 + 1086822.

It is an arithmetic number, because the mean of its divisors is an integer number (1086822).

2^2173643 is an apocalyptic number.

2173643 is a deficient number, since it is larger than the sum of its proper divisors (1).

2173643 is an equidigital number, since it uses as much as digits as its factorization.

2173643 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3024, while the sum is 26.

The square root of 2173643 is about 1474.3279825059. The cubic root of 2173643 is about 129.5376673719.

The spelling of 2173643 in words is "two million, one hundred seventy-three thousand, six hundred forty-three".