212669 has 2 divisors, whose sum is σ = 212670. Its totient is φ = 212668.

The previous prime is 212651. The next prime is 212671. The reversal of 212669 is 966212.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 156025 + 56644 = 395^2 + 238^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-212669 is a prime.

It is a super-2 number, since 2×212669² = 90456207122, which contains 22 as substring.

Together with 212671, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (212369) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106334 + 106335.

It is an arithmetic number, because the mean of its divisors is an integer number (106335).

2²¹²⁶⁶⁹ is an apocalyptic number.

It is an amenable number.

212669 is a deficient number, since it is larger than the sum of its proper divisors (1).

212669 is an equidigital number, since it uses as much as digits as its factorization.

212669 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1296, while the sum is 26.

The square root of 212669 is about 461.1604926704. The cubic root of 212669 is about 59.6899749072.

The spelling of 212669 in words is "two hundred twelve thousand, six hundred sixty-nine".