299393813 has 2 divisors, whose sum is σ = 299393814. Its totient is φ = 299393812.

The previous prime is 299393797. The next prime is 299393827. The reversal of 299393813 is 318393992.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 299393809 + 4 = 17303^2 + 2^2 .

It is a cyclic number.

It is not a de Polignac number, because 299393813 - 2⁴ = 299393797 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (299393863) 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, 149696906 + 149696907.

It is an arithmetic number, because the mean of its divisors is an integer number (149696907).

Almost surely, 2^299393813 is an apocalyptic number.

It is an amenable number.

299393813 is a deficient number, since it is larger than the sum of its proper divisors (1).

299393813 is an equidigital number, since it uses as much as digits as its factorization.

299393813 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 314928, while the sum is 47.

The square root of 299393813 is about 17303.0001155869. Note that the first 3 decimals coincide. The cubic root of 299393813 is about 668.9817554344.

The spelling of 299393813 in words is "two hundred ninety-nine million, three hundred ninety-three thousand, eight hundred thirteen".