2209890169 has 2 divisors, whose sum is σ = 2209890170. Its totient is φ = 2209890168.

The previous prime is 2209890113. The next prime is 2209890191. The reversal of 2209890169 is 9610989022.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2186965225 + 22924944 = 46765^2 + 4788^2 .

It is a cyclic number.

It is not a de Polignac number, because 2209890169 - 2¹³ = 2209881977 is a prime.

It is a super-2 number, since 2×2209890169² = 9767229118085697122, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (2209890269) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1104945084 + 1104945085.

It is an arithmetic number, because the mean of its divisors is an integer number (1104945085).

Almost surely, 2^2209890169 is an apocalyptic number.

It is an amenable number.

2209890169 is a deficient number, since it is larger than the sum of its proper divisors (1).

2209890169 is an equidigital number, since it uses as much as digits as its factorization.

2209890169 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 139968, while the sum is 46.

The square root of 2209890169 is about 47009.4689291423. The cubic root of 2209890169 is about 1302.5374834821.

The spelling of 2209890169 in words is "two billion, two hundred nine million, eight hundred ninety thousand, one hundred sixty-nine".