1211983 has 2 divisors, whose sum is σ = 1211984. Its totient is φ = 1211982.

The previous prime is 1211933. The next prime is 1211999. The reversal of 1211983 is 3891121.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1211983 - 2¹³ = 1203791 is a prime.

It is an Ulam number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1211923) 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, 605991 + 605992.

It is an arithmetic number, because the mean of its divisors is an integer number (605992).

2^1211983 is an apocalyptic number.

1211983 is a deficient number, since it is larger than the sum of its proper divisors (1).

1211983 is an equidigital number, since it uses as much as digits as its factorization.

1211983 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 432, while the sum is 25.

The square root of 1211983 is about 1100.9009946403. The cubic root of 1211983 is about 106.6184037302.

The spelling of 1211983 in words is "one million, two hundred eleven thousand, nine hundred eighty-three".