1916543 has 2 divisors, whose sum is σ = 1916544. Its totient is φ = 1916542.

The previous prime is 1916539. The next prime is 1916573. The reversal of 1916543 is 3456191.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1916543 - 2² = 1916539 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 (1916573) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 958271 + 958272.

It is an arithmetic number, because the mean of its divisors is an integer number (958272).

2^1916543 is an apocalyptic number.

1916543 is a deficient number, since it is larger than the sum of its proper divisors (1).

1916543 is an equidigital number, since it uses as much as digits as its factorization.

1916543 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3240, while the sum is 29.

The square root of 1916543 is about 1384.3926466144. The cubic root of 1916543 is about 124.2146602651.

The spelling of 1916543 in words is "one million, nine hundred sixteen thousand, five hundred forty-three".