2978543 has 2 divisors, whose sum is σ = 2978544. Its totient is φ = 2978542.

The previous prime is 2978539. The next prime is 2978551. The reversal of 2978543 is 3458792.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2978543 - 2² = 2978539 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 2978497 and 2978506.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2978533) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1489271 + 1489272.

It is an arithmetic number, because the mean of its divisors is an integer number (1489272).

2^2978543 is an apocalyptic number.

2978543 is a deficient number, since it is larger than the sum of its proper divisors (1).

2978543 is an equidigital number, since it uses as much as digits as its factorization.

2978543 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 60480, while the sum is 38.

The square root of 2978543 is about 1725.8455898486. The cubic root of 2978543 is about 143.8802856626.

Subtracting 2978543 from its reverse (3458792), we obtain a square (480249 = 693²).

The spelling of 2978543 in words is "two million, nine hundred seventy-eight thousand, five hundred forty-three".