213966836969 has 2 divisors, whose sum is σ = 213966836970. Its totient is φ = 213966836968.

The previous prime is 213966836917. The next prime is 213966836977. The reversal of 213966836969 is 969638669312.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 186655969369 + 27310867600 = 432037^2 + 165260^2 .

It is a cyclic number.

It is not a de Polignac number, because 213966836969 - 2¹⁶ = 213966771433 is a prime.

It is a super-2 number, since 2×213966836969² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 213966836899 and 213966836908.

It is not a weakly prime, because it can be changed into another prime (213966836269) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106983418484 + 106983418485.

It is an arithmetic number, because the mean of its divisors is an integer number (106983418485).

Almost surely, 2^213966836969 is an apocalyptic number.

It is an amenable number.

213966836969 is a deficient number, since it is larger than the sum of its proper divisors (1).

213966836969 is an equidigital number, since it uses as much as digits as its factorization.

213966836969 is an evil number, because the sum of its binary digits is even.

The product of its digits is 136048896, while the sum is 68.

The spelling of 213966836969 in words is "two hundred thirteen billion, nine hundred sixty-six million, eight hundred thirty-six thousand, nine hundred sixty-nine".