220396717 has 2 divisors, whose sum is σ = 220396718. Its totient is φ = 220396716.

The previous prime is 220396697. The next prime is 220396727. The reversal of 220396717 is 717693022.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 207907561 + 12489156 = 14419^2 + 3534^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-220396717 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (220396727) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110198358 + 110198359.

It is an arithmetic number, because the mean of its divisors is an integer number (110198359).

Almost surely, 2^220396717 is an apocalyptic number.

It is an amenable number.

220396717 is a deficient number, since it is larger than the sum of its proper divisors (1).

220396717 is an equidigital number, since it uses as much as digits as its factorization.

220396717 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 31752, while the sum is 37.

The square root of 220396717 is about 14845.7642780694. The cubic root of 220396717 is about 604.0437202465.

The spelling of 220396717 in words is "two hundred twenty million, three hundred ninety-six thousand, seven hundred seventeen".