213397822769 has 2 divisors, whose sum is σ = 213397822770. Its totient is φ = 213397822768.

The previous prime is 213397822741. The next prime is 213397822789. The reversal of 213397822769 is 967228793312.

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., 114244000000 + 99153822769 = 338000^2 + 314887^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-213397822769 is a prime.

It is a super-2 number, since 2×213397822769² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (213397822789) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106698911384 + 106698911385.

It is an arithmetic number, because the mean of its divisors is an integer number (106698911385).

Almost surely, 2^213397822769 is an apocalyptic number.

It is an amenable number.

213397822769 is a deficient number, since it is larger than the sum of its proper divisors (1).

213397822769 is an equidigital number, since it uses as much as digits as its factorization.

213397822769 is an evil number, because the sum of its binary digits is even.

The product of its digits is 13716864, while the sum is 59.

The spelling of 213397822769 in words is "two hundred thirteen billion, three hundred ninety-seven million, eight hundred twenty-two thousand, seven hundred sixty-nine".