214121909 has 2 divisors, whose sum is σ = 214121910. Its totient is φ = 214121908.

The previous prime is 214121899. The next prime is 214121917. The reversal of 214121909 is 909121412.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 192238225 + 21883684 = 13865^2 + 4678^2 .

It is a cyclic number.

It is not a de Polignac number, because 214121909 - 2⁴ = 214121893 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (214121939) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 107060954 + 107060955.

It is an arithmetic number, because the mean of its divisors is an integer number (107060955).

Almost surely, 2^214121909 is an apocalyptic number.

It is an amenable number.

214121909 is a deficient number, since it is larger than the sum of its proper divisors (1).

214121909 is an equidigital number, since it uses as much as digits as its factorization.

214121909 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1296, while the sum is 29.

The square root of 214121909 is about 14632.9050089174. The cubic root of 214121909 is about 598.2559623180.

The spelling of 214121909 in words is "two hundred fourteen million, one hundred twenty-one thousand, nine hundred nine".