2220389 has 2 divisors, whose sum is σ = 2220390. Its totient is φ = 2220388.

The previous prime is 2220373. The next prime is 2220403. The reversal of 2220389 is 9830222.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2220100 + 289 = 1490^2 + 17^2 .

It is a cyclic number.

It is not a de Polignac number, because 2220389 - 2⁴ = 2220373 is a prime.

It is a super-2 number, since 2×2220389² = 9860254622642, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2220349) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1110194 + 1110195.

It is an arithmetic number, because the mean of its divisors is an integer number (1110195).

2^2220389 is an apocalyptic number.

It is an amenable number.

2220389 is a deficient number, since it is larger than the sum of its proper divisors (1).

2220389 is an equidigital number, since it uses as much as digits as its factorization.

2220389 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1728, while the sum is 26.

The square root of 2220389 is about 1490.0969767099. The cubic root of 2220389 is about 130.4596940551.

The spelling of 2220389 in words is "two million, two hundred twenty thousand, three hundred eighty-nine".