6940217 has 2 divisors, whose sum is σ = 6940218. Its totient is φ = 6940216.

The previous prime is 6940207. The next prime is 6940223. The reversal of 6940217 is 7120496.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6330256 + 609961 = 2516^2 + 781^2 .

It is a cyclic number.

It is not a de Polignac number, because 6940217 - 2¹⁰ = 6939193 is a prime.

It is a super-2 number, since 2×6940217² = 96333224014178, which contains 22 as substring.

It is an Ulam number.

It is a self number, because there is not a number n which added to its sum of digits gives 6940217.

It is not a weakly prime, because it can be changed into another prime (6940207) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3470108 + 3470109.

It is an arithmetic number, because the mean of its divisors is an integer number (3470109).

Almost surely, 2^6940217 is an apocalyptic number.

It is an amenable number.

6940217 is a deficient number, since it is larger than the sum of its proper divisors (1).

6940217 is an equidigital number, since it uses as much as digits as its factorization.

6940217 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3024, while the sum is 29.

The square root of 6940217 is about 2634.4291601787. The cubic root of 6940217 is about 190.7469855070.

It can be divided in two parts, 6940 and 217, that multiplied together give a triangular number (1505980 = T₁₇₃₅).

The spelling of 6940217 in words is "six million, nine hundred forty thousand, two hundred seventeen".