220106989 has 2 divisors, whose sum is σ = 220106990. Its totient is φ = 220106988.

The previous prime is 220106951. The next prime is 220107023. The reversal of 220106989 is 989601022.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 168870025 + 51236964 = 12995^2 + 7158^2 .

It is a cyclic number.

It is not a de Polignac number, because 220106989 - 2¹⁵ = 220074221 is a prime.

It is a super-3 number, since 3×220106989³ (a number of 26 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (220106489) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110053494 + 110053495.

It is an arithmetic number, because the mean of its divisors is an integer number (110053495).

Almost surely, 2^220106989 is an apocalyptic number.

It is an amenable number.

220106989 is a deficient number, since it is larger than the sum of its proper divisors (1).

220106989 is an equidigital number, since it uses as much as digits as its factorization.

220106989 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 15552, while the sum is 37.

The square root of 220106989 is about 14836.0031342677. The cubic root of 220106989 is about 603.7789172666.

The spelling of 220106989 in words is "two hundred twenty million, one hundred six thousand, nine hundred eighty-nine".