1964143 has 2 divisors, whose sum is σ = 1964144. Its totient is φ = 1964142.

The previous prime is 1964119. The next prime is 1964159. The reversal of 1964143 is 3414691.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1964143 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1964113) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 982071 + 982072.

It is an arithmetic number, because the mean of its divisors is an integer number (982072).

2^1964143 is an apocalyptic number.

1964143 is a deficient number, since it is larger than the sum of its proper divisors (1).

1964143 is an equidigital number, since it uses as much as digits as its factorization.

1964143 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2592, while the sum is 28.

The square root of 1964143 is about 1401.4788617742. The cubic root of 1964143 is about 125.2346100562.

The spelling of 1964143 in words is "one million, nine hundred sixty-four thousand, one hundred forty-three".