213397822969 has 2 divisors, whose sum is σ = 213397822970. Its totient is φ = 213397822968.

The previous prime is 213397822907. The next prime is 213397823003. The reversal of 213397822969 is 969228793312.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 213063481744 + 334341225 = 461588^2 + 18285^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-213397822969 is a prime.

It is a super-2 number, since 2×213397822969² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (213397822769) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106698911484 + 106698911485.

It is an arithmetic number, because the mean of its divisors is an integer number (106698911485).

Almost surely, 2^213397822969 is an apocalyptic number.

It is an amenable number.

213397822969 is a deficient number, since it is larger than the sum of its proper divisors (1).

213397822969 is an equidigital number, since it uses as much as digits as its factorization.

213397822969 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 17635968, while the sum is 61.

The spelling of 213397822969 in words is "two hundred thirteen billion, three hundred ninety-seven million, eight hundred twenty-two thousand, nine hundred sixty-nine".