220689673 has 2 divisors, whose sum is σ = 220689674. Its totient is φ = 220689672.

The previous prime is 220689653. The next prime is 220689683. The reversal of 220689673 is 376986022.

220689673 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 127509264 + 93180409 = 11292^2 + 9653^2 .

It is a cyclic number.

It is not a de Polignac number, because 220689673 - 2⁵ = 220689641 is a prime.

It is not a weakly prime, because it can be changed into another prime (220689653) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110344836 + 110344837.

It is an arithmetic number, because the mean of its divisors is an integer number (110344837).

Almost surely, 2^220689673 is an apocalyptic number.

It is an amenable number.

220689673 is a deficient number, since it is larger than the sum of its proper divisors (1).

220689673 is an equidigital number, since it uses as much as digits as its factorization.

220689673 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 217728, while the sum is 43.

The square root of 220689673 is about 14855.6276541922. The cubic root of 220689673 is about 604.3112376681.

The spelling of 220689673 in words is "two hundred twenty million, six hundred eighty-nine thousand, six hundred seventy-three".