1920343 has 2 divisors, whose sum is σ = 1920344. Its totient is φ = 1920342.

The previous prime is 1920299. The next prime is 1920361. The reversal of 1920343 is 3430291.

It is a strong prime.

It is an emirp because it is prime and its reverse (3430291) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1920343 is a prime.

It is equal to p₁₄₃₄₃₇ and since 1920343 and 143437 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1920383) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 960171 + 960172.

It is an arithmetic number, because the mean of its divisors is an integer number (960172).

2^1920343 is an apocalyptic number.

1920343 is a deficient number, since it is larger than the sum of its proper divisors (1).

1920343 is an equidigital number, since it uses as much as digits as its factorization.

1920343 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 648, while the sum is 22.

The square root of 1920343 is about 1385.7644099918. The cubic root of 1920343 is about 124.2967010527.

The spelling of 1920343 in words is "one million, nine hundred twenty thousand, three hundred forty-three".