1921363 has 2 divisors, whose sum is σ = 1921364. Its totient is φ = 1921362.

The previous prime is 1921327. The next prime is 1921393. The reversal of 1921363 is 3631291.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1921363 - 2⁹ = 1920851 is a prime.

It is not a weakly prime, because it can be changed into another prime (1921393) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 960681 + 960682.

It is an arithmetic number, because the mean of its divisors is an integer number (960682).

2^1921363 is an apocalyptic number.

1921363 is a deficient number, since it is larger than the sum of its proper divisors (1).

1921363 is an equidigital number, since it uses as much as digits as its factorization.

1921363 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 972, while the sum is 25.

The square root of 1921363 is about 1386.1323890596. The cubic root of 1921363 is about 124.3187041001.

The spelling of 1921363 in words is "one million, nine hundred twenty-one thousand, three hundred sixty-three".