2178343 has 2 divisors, whose sum is σ = 2178344. Its totient is φ = 2178342.

The previous prime is 2178313. The next prime is 2178359. The reversal of 2178343 is 3438712.

2178343 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2178343 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2178313) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1089171 + 1089172.

It is an arithmetic number, because the mean of its divisors is an integer number (1089172).

2^2178343 is an apocalyptic number.

2178343 is a deficient number, since it is larger than the sum of its proper divisors (1).

2178343 is an equidigital number, since it uses as much as digits as its factorization.

2178343 is an odious number, because the sum of its binary digits is odd.

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

The square root of 2178343 is about 1475.9210683502. The cubic root of 2178343 is about 129.6309652359.

The spelling of 2178343 in words is "two million, one hundred seventy-eight thousand, three hundred forty-three".