220769993 has 2 divisors, whose sum is σ = 220769994. Its totient is φ = 220769992.

The previous prime is 220769897. The next prime is 220769999. The reversal of 220769993 is 399967022.

220769993 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., 210453049 + 10316944 = 14507^2 + 3212^2 .

It is a cyclic number.

It is not a de Polignac number, because 220769993 - 2¹⁸ = 220507849 is a prime.

It is not a weakly prime, because it can be changed into another prime (220769999) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110384996 + 110384997.

It is an arithmetic number, because the mean of its divisors is an integer number (110384997).

Almost surely, 2^220769993 is an apocalyptic number.

It is an amenable number.

220769993 is a deficient number, since it is larger than the sum of its proper divisors (1).

220769993 is an equidigital number, since it uses as much as digits as its factorization.

220769993 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 367416, while the sum is 47.

The square root of 220769993 is about 14858.3307608897. The cubic root of 220769993 is about 604.3845417949.

The spelling of 220769993 in words is "two hundred twenty million, seven hundred sixty-nine thousand, nine hundred ninety-three".