214243993 has 2 divisors, whose sum is σ = 214243994. Its totient is φ = 214243992.

The previous prime is 214243973. The next prime is 214244021. The reversal of 214243993 is 399342412.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 207705744 + 6538249 = 14412^2 + 2557^2 .

It is a cyclic number.

It is not a de Polignac number, because 214243993 - 2²¹ = 212146841 is a prime.

It is not a weakly prime, because it can be changed into another prime (214243963) 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, 107121996 + 107121997.

It is an arithmetic number, because the mean of its divisors is an integer number (107121997).

Almost surely, 2^214243993 is an apocalyptic number.

It is an amenable number.

214243993 is a deficient number, since it is larger than the sum of its proper divisors (1).

214243993 is an equidigital number, since it uses as much as digits as its factorization.

214243993 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 46656, while the sum is 37.

The square root of 214243993 is about 14637.0759716550. The cubic root of 214243993 is about 598.3696414904.

The spelling of 214243993 in words is "two hundred fourteen million, two hundred forty-three thousand, nine hundred ninety-three".