214646921 has 2 divisors, whose sum is σ = 214646922. Its totient is φ = 214646920.

The previous prime is 214646911. The next prime is 214646941. The reversal of 214646921 is 129646412.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 123654400 + 90992521 = 11120^2 + 9539^2 .

It is a cyclic number.

It is not a de Polignac number, because 214646921 - 2¹⁰ = 214645897 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (214646911) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 107323460 + 107323461.

It is an arithmetic number, because the mean of its divisors is an integer number (107323461).

Almost surely, 2^214646921 is an apocalyptic number.

It is an amenable number.

214646921 is a deficient number, since it is larger than the sum of its proper divisors (1).

214646921 is an equidigital number, since it uses as much as digits as its factorization.

214646921 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 20736, while the sum is 35.

The square root of 214646921 is about 14650.8334575204. The cubic root of 214646921 is about 598.7445238726.

The spelling of 214646921 in words is "two hundred fourteen million, six hundred forty-six thousand, nine hundred twenty-one".