2219869 has 2 divisors, whose sum is σ = 2219870. Its totient is φ = 2219868.

The previous prime is 2219849. The next prime is 2219881. The reversal of 2219869 is 9689122.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1127844 + 1092025 = 1062^2 + 1045^2 .

It is a cyclic number.

It is not a de Polignac number, because 2219869 - 2¹⁹ = 1695581 is a prime.

It is a super-3 number, since 3×2219869³ = 32817333759270035727, which contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Chen prime.

It is an Ulam number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2219839) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1109934 + 1109935.

It is an arithmetic number, because the mean of its divisors is an integer number (1109935).

2^2219869 is an apocalyptic number.

It is an amenable number.

2219869 is a deficient number, since it is larger than the sum of its proper divisors (1).

2219869 is an equidigital number, since it uses as much as digits as its factorization.

2219869 is an evil number, because the sum of its binary digits is even.

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

The square root of 2219869 is about 1489.9224812050. The cubic root of 2219869 is about 130.4495090023.

It can be divided in two parts, 22 and 19869, that added together give a palindrome (19891).

The spelling of 2219869 in words is "two million, two hundred nineteen thousand, eight hundred sixty-nine".