1218383 has 2 divisors, whose sum is σ = 1218384. Its totient is φ = 1218382.

The previous prime is 1218367. The next prime is 1218391. The reversal of 1218383 is 3838121.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1218383 - 2⁴ = 1218367 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1218313) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 609191 + 609192.

It is an arithmetic number, because the mean of its divisors is an integer number (609192).

2^1218383 is an apocalyptic number.

1218383 is a deficient number, since it is larger than the sum of its proper divisors (1).

1218383 is an equidigital number, since it uses as much as digits as its factorization.

1218383 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1152, while the sum is 26.

The square root of 1218383 is about 1103.8038775072. The cubic root of 1218383 is about 106.8057441491.

The spelling of 1218383 in words is "one million, two hundred eighteen thousand, three hundred eighty-three".