1955543 has 2 divisors, whose sum is σ = 1955544. Its totient is φ = 1955542.

The previous prime is 1955539. The next prime is 1955579. The reversal of 1955543 is 3455591.

It is a weak prime.

It is an emirp because it is prime and its reverse (3455591) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1955543 - 2² = 1955539 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1955533) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 977771 + 977772.

It is an arithmetic number, because the mean of its divisors is an integer number (977772).

2^1955543 is an apocalyptic number.

1955543 is a deficient number, since it is larger than the sum of its proper divisors (1).

1955543 is an equidigital number, since it uses as much as digits as its factorization.

1955543 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 13500, while the sum is 32.

The square root of 1955543 is about 1398.4073083333. The cubic root of 1955543 is about 125.0515627274.

The spelling of 1955543 in words is "one million, nine hundred fifty-five thousand, five hundred forty-three".