213045780797 has 2 divisors, whose sum is σ = 213045780798. Its totient is φ = 213045780796.

The previous prime is 213045780719. The next prime is 213045780977. The reversal of 213045780797 is 797087540312.

Together with next prime (213045780977) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 113312351161 + 99733429636 = 336619^2 + 315806^2 .

It is a cyclic number.

It is not a de Polignac number, because 213045780797 - 2¹⁶ = 213045715261 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (213045780097) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106522890398 + 106522890399.

It is an arithmetic number, because the mean of its divisors is an integer number (106522890399).

Almost surely, 2^213045780797 is an apocalyptic number.

It is an amenable number.

213045780797 is a deficient number, since it is larger than the sum of its proper divisors (1).

213045780797 is an equidigital number, since it uses as much as digits as its factorization.

213045780797 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2963520, while the sum is 53.

The spelling of 213045780797 in words is "two hundred thirteen billion, forty-five million, seven hundred eighty thousand, seven hundred ninety-seven".