6906217 has 2 divisors, whose sum is σ = 6906218. Its totient is φ = 6906216.

The previous prime is 6906209. The next prime is 6906223. The reversal of 6906217 is 7126096.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6471936 + 434281 = 2544^2 + 659^2 .

It is a cyclic number.

It is not a de Polignac number, because 6906217 - 2³ = 6906209 is a prime.

It is not a weakly prime, because it can be changed into another prime (6906247) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3453108 + 3453109.

It is an arithmetic number, because the mean of its divisors is an integer number (3453109).

Almost surely, 2^6906217 is an apocalyptic number.

It is an amenable number.

6906217 is a deficient number, since it is larger than the sum of its proper divisors (1).

6906217 is an equidigital number, since it uses as much as digits as its factorization.

6906217 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4536, while the sum is 31.

The square root of 6906217 is about 2627.9682265964. The cubic root of 6906217 is about 190.4349867591.

Subtracting from 6906217 its sum of digits (31), we obtain a triangular number (6906186 = T₃₇₁₆).

The spelling of 6906217 in words is "six million, nine hundred six thousand, two hundred seventeen".