1223863 has 2 divisors, whose sum is σ = 1223864. Its totient is φ = 1223862.

The previous prime is 1223857. The next prime is 1223867. The reversal of 1223863 is 3683221.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1223863 - 2⁹ = 1223351 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1223867) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 611931 + 611932.

It is an arithmetic number, because the mean of its divisors is an integer number (611932).

2^1223863 is an apocalyptic number.

1223863 is a deficient number, since it is larger than the sum of its proper divisors (1).

1223863 is an equidigital number, since it uses as much as digits as its factorization.

1223863 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1728, while the sum is 25.

The square root of 1223863 is about 1106.2834175744. The cubic root of 1223863 is about 106.9656337068.

The spelling of 1223863 in words is "one million, two hundred twenty-three thousand, eight hundred sixty-three".