1964243 has 2 divisors, whose sum is σ = 1964244. Its totient is φ = 1964242.

The previous prime is 1964213. The next prime is 1964297. The reversal of 1964243 is 3424691.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1964243 - 2¹⁰ = 1963219 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (1964203) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 982121 + 982122.

It is an arithmetic number, because the mean of its divisors is an integer number (982122).

2^1964243 is an apocalyptic number.

1964243 is a deficient number, since it is larger than the sum of its proper divisors (1).

1964243 is an equidigital number, since it uses as much as digits as its factorization.

1964243 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5184, while the sum is 29.

The square root of 1964243 is about 1401.5145379196. The cubic root of 1964243 is about 125.2367353679.

The spelling of 1964243 in words is "one million, nine hundred sixty-four thousand, two hundred forty-three".