213966617 has 2 divisors, whose sum is σ = 213966618. Its totient is φ = 213966616.

The previous prime is 213966593. The next prime is 213966689. The reversal of 213966617 is 716669312.

213966617 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 109599961 + 104366656 = 10469^2 + 10216^2 .

It is a cyclic number.

It is not a de Polignac number, because 213966617 - 2²⁴ = 197189401 is a prime.

It is not a weakly prime, because it can be changed into another prime (213966317) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106983308 + 106983309.

It is an arithmetic number, because the mean of its divisors is an integer number (106983309).

Almost surely, 2^213966617 is an apocalyptic number.

It is an amenable number.

213966617 is a deficient number, since it is larger than the sum of its proper divisors (1).

213966617 is an equidigital number, since it uses as much as digits as its factorization.

213966617 is an evil number, because the sum of its binary digits is even.

The product of its digits is 81648, while the sum is 41.

The square root of 213966617 is about 14627.5977863763. The cubic root of 213966617 is about 598.1112988814. Note that the first 3 decimals are identical.

The spelling of 213966617 in words is "two hundred thirteen million, nine hundred sixty-six thousand, six hundred seventeen".