214642609 has 2 divisors, whose sum is σ = 214642610. Its totient is φ = 214642608.

The previous prime is 214642537. The next prime is 214642613. The reversal of 214642609 is 906246412.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 213978384 + 664225 = 14628^2 + 815^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-214642609 is a prime.

It is not a weakly prime, because it can be changed into another prime (214642619) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 107321304 + 107321305.

It is an arithmetic number, because the mean of its divisors is an integer number (107321305).

Almost surely, 2^214642609 is an apocalyptic number.

It is an amenable number.

214642609 is a deficient number, since it is larger than the sum of its proper divisors (1).

214642609 is an equidigital number, since it uses as much as digits as its factorization.

214642609 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 20736, while the sum is 34.

The square root of 214642609 is about 14650.6862979179. The cubic root of 214642609 is about 598.7405144918.

The spelling of 214642609 in words is "two hundred fourteen million, six hundred forty-two thousand, six hundred nine".