2778343 has 2 divisors, whose sum is σ = 2778344. Its totient is φ = 2778342.

The previous prime is 2778341. The next prime is 2778353. The reversal of 2778343 is 3438772.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2778343 - 2¹ = 2778341 is a prime.

Together with 2778341, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 2778299 and 2778308.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2778341) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1389171 + 1389172.

It is an arithmetic number, because the mean of its divisors is an integer number (1389172).

2^2778343 is an apocalyptic number.

2778343 is a deficient number, since it is larger than the sum of its proper divisors (1).

2778343 is an equidigital number, since it uses as much as digits as its factorization.

2778343 is an evil number, because the sum of its binary digits is even.

The product of its digits is 28224, while the sum is 34.

The square root of 2778343 is about 1666.8362247084. The cubic root of 2778343 is about 140.5816447747.

The spelling of 2778343 in words is "two million, seven hundred seventy-eight thousand, three hundred forty-three".