1199813 has 2 divisors, whose sum is σ = 1199814. Its totient is φ = 1199812.

The previous prime is 1199801. The next prime is 1199819. The reversal of 1199813 is 3189911.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 611524 + 588289 = 782^2 + 767^2 .

It is a cyclic number.

It is not a de Polignac number, because 1199813 - 2⁸ = 1199557 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a plaindrome in base 14.

It is a self number, because there is not a number n which added to its sum of digits gives 1199813.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1199819) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 599906 + 599907.

It is an arithmetic number, because the mean of its divisors is an integer number (599907).

2^1199813 is an apocalyptic number.

It is an amenable number.

1199813 is a deficient number, since it is larger than the sum of its proper divisors (1).

1199813 is an equidigital number, since it uses as much as digits as its factorization.

1199813 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1944, while the sum is 32.

The square root of 1199813 is about 1095.3597582530. The cubic root of 1199813 is about 106.2603367106.

The spelling of 1199813 in words is "one million, one hundred ninety-nine thousand, eight hundred thirteen".