1216693 has 2 divisors, whose sum is σ = 1216694. Its totient is φ = 1216692.

The previous prime is 1216681. The next prime is 1216711. The reversal of 1216693 is 3966121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 877969 + 338724 = 937^2 + 582^2 .

It is an emirp because it is prime and its reverse (3966121) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1216693 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1216603) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 608346 + 608347.

It is an arithmetic number, because the mean of its divisors is an integer number (608347).

2^1216693 is an apocalyptic number.

It is an amenable number.

1216693 is a deficient number, since it is larger than the sum of its proper divisors (1).

1216693 is an equidigital number, since it uses as much as digits as its factorization.

1216693 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1944, while the sum is 28.

The square root of 1216693 is about 1103.0380773119. The cubic root of 1216693 is about 106.7563384397.

The spelling of 1216693 in words is "one million, two hundred sixteen thousand, six hundred ninety-three".