213598781393 has 2 divisors, whose sum is σ = 213598781394. Its totient is φ = 213598781392.

The previous prime is 213598781359. The next prime is 213598781399. The reversal of 213598781393 is 393187895312.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 110109821584 + 103488959809 = 331828^2 + 321697^2 .

It is a cyclic number.

It is not a de Polignac number, because 213598781393 - 2⁶ = 213598781329 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (213598781399) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106799390696 + 106799390697.

It is an arithmetic number, because the mean of its divisors is an integer number (106799390697).

Almost surely, 2^213598781393 is an apocalyptic number.

It is an amenable number.

213598781393 is a deficient number, since it is larger than the sum of its proper divisors (1).

213598781393 is an equidigital number, since it uses as much as digits as its factorization.

213598781393 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 9797760, while the sum is 59.

The spelling of 213598781393 in words is "two hundred thirteen billion, five hundred ninety-eight million, seven hundred eighty-one thousand, three hundred ninety-three".