109666213 has 2 divisors, whose sum is σ = 109666214. Its totient is φ = 109666212.

The previous prime is 109666199. The next prime is 109666217. The reversal of 109666213 is 312666901.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 109474369 + 191844 = 10463^2 + 438^2 .

It is a cyclic number.

It is not a de Polignac number, because 109666213 - 2¹⁷ = 109535141 is a prime.

It is a super-2 number, since 2×109666213² = 24053356547522738, which contains 22 as substring.

It is equal to p_6285247 and since 109666213 and 6285247 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (109666217) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 54833106 + 54833107.

It is an arithmetic number, because the mean of its divisors is an integer number (54833107).

Almost surely, 2^109666213 is an apocalyptic number.

It is an amenable number.

109666213 is a deficient number, since it is larger than the sum of its proper divisors (1).

109666213 is an equidigital number, since it uses as much as digits as its factorization.

109666213 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 11664, while the sum is 34.

The square root of 109666213 is about 10472.1637210273. The cubic root of 109666213 is about 478.6568541731.

The spelling of 109666213 in words is "one hundred nine million, six hundred sixty-six thousand, two hundred thirteen".