214543639 has 2 divisors, whose sum is σ = 214543640. Its totient is φ = 214543638.

The previous prime is 214543631. The next prime is 214543643. The reversal of 214543639 is 936345412.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 214543639 - 2³ = 214543631 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 214543598 and 214543607.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (214543631) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 107271819 + 107271820.

It is an arithmetic number, because the mean of its divisors is an integer number (107271820).

Almost surely, 2^214543639 is an apocalyptic number.

214543639 is a deficient number, since it is larger than the sum of its proper divisors (1).

214543639 is an equidigital number, since it uses as much as digits as its factorization.

214543639 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 77760, while the sum is 37.

The square root of 214543639 is about 14647.3082510064. The cubic root of 214543639 is about 598.6484755144.

The spelling of 214543639 in words is "two hundred fourteen million, five hundred forty-three thousand, six hundred thirty-nine".