214187689 has 2 divisors, whose sum is σ = 214187690. Its totient is φ = 214187688.

The previous prime is 214187671. The next prime is 214187693. The reversal of 214187689 is 986781412.

214187689 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 210482064 + 3705625 = 14508^2 + 1925^2 .

It is a cyclic number.

It is not a de Polignac number, because 214187689 - 2¹⁷ = 214056617 is a prime.

It is a super-2 number, since 2×214187689² = 91752732238321442, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (214187609) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 107093844 + 107093845.

It is an arithmetic number, because the mean of its divisors is an integer number (107093845).

Almost surely, 2^214187689 is an apocalyptic number.

It is an amenable number.

214187689 is a deficient number, since it is larger than the sum of its proper divisors (1).

214187689 is an equidigital number, since it uses as much as digits as its factorization.

214187689 is an evil number, because the sum of its binary digits is even.

The product of its digits is 193536, while the sum is 46.

The square root of 214187689 is about 14635.1525103089. The cubic root of 214187689 is about 598.3172190855.

The spelling of 214187689 in words is "two hundred fourteen million, one hundred eighty-seven thousand, six hundred eighty-nine".