220109993 has 2 divisors, whose sum is σ = 220109994. Its totient is φ = 220109992.

The previous prime is 220109987. The next prime is 220110001. The reversal of 220109993 is 399901022.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 115498009 + 104611984 = 10747^2 + 10228^2 .

It is a cyclic number.

It is not a de Polignac number, because 220109993 - 2¹⁰ = 220108969 is a prime.

It is not a weakly prime, because it can be changed into another prime (220109933) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110054996 + 110054997.

It is an arithmetic number, because the mean of its divisors is an integer number (110054997).

Almost surely, 2^220109993 is an apocalyptic number.

It is an amenable number.

220109993 is a deficient number, since it is larger than the sum of its proper divisors (1).

220109993 is an equidigital number, since it uses as much as digits as its factorization.

220109993 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8748, while the sum is 35.

The square root of 220109993 is about 14836.1043741273. The cubic root of 220109993 is about 603.7816640272.

The spelling of 220109993 in words is "two hundred twenty million, one hundred nine thousand, nine hundred ninety-three".