1623943 has 2 divisors, whose sum is σ = 1623944. Its totient is φ = 1623942.

The previous prime is 1623931. The next prime is 1623977. The reversal of 1623943 is 3493261.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1623943 - 2⁹ = 1623431 is a prime.

It is an Ulam number.

It is a zygodrome in base 2.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1624943) 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, 811971 + 811972.

It is an arithmetic number, because the mean of its divisors is an integer number (811972).

2^1623943 is an apocalyptic number.

1623943 is a deficient number, since it is larger than the sum of its proper divisors (1).

1623943 is an equidigital number, since it uses as much as digits as its factorization.

1623943 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3888, while the sum is 28.

The square root of 1623943 is about 1274.3402214479. The cubic root of 1623943 is about 117.5412379775.

The spelling of 1623943 in words is "one million, six hundred twenty-three thousand, nine hundred forty-three".