214389661 has 2 divisors, whose sum is σ = 214389662. Its totient is φ = 214389660.

The previous prime is 214389641. The next prime is 214389677. The reversal of 214389661 is 166983412.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 191407225 + 22982436 = 13835^2 + 4794^2 .

It is a cyclic number.

It is not a de Polignac number, because 214389661 - 2⁵ = 214389629 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (214389641) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 107194830 + 107194831.

It is an arithmetic number, because the mean of its divisors is an integer number (107194831).

Almost surely, 2^214389661 is an apocalyptic number.

It is an amenable number.

214389661 is a deficient number, since it is larger than the sum of its proper divisors (1).

214389661 is an equidigital number, since it uses as much as digits as its factorization.

214389661 is an evil number, because the sum of its binary digits is even.

The product of its digits is 62208, while the sum is 40.

The square root of 214389661 is about 14642.0511199763. The cubic root of 214389661 is about 598.5052245400.

The spelling of 214389661 in words is "two hundred fourteen million, three hundred eighty-nine thousand, six hundred sixty-one".