2188919 has 2 divisors, whose sum is σ = 2188920. Its totient is φ = 2188918.

The previous prime is 2188913. The next prime is 2188981. The reversal of 2188919 is 9198812.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2188919 - 2⁸ = 2188663 is a prime.

It is a super-2 number, since 2×2188919² = 9582732777122, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2188913) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1094459 + 1094460.

It is an arithmetic number, because the mean of its divisors is an integer number (1094460).

2^2188919 is an apocalyptic number.

2188919 is a deficient number, since it is larger than the sum of its proper divisors (1).

2188919 is an equidigital number, since it uses as much as digits as its factorization.

2188919 is an evil number, because the sum of its binary digits is even.

The product of its digits is 10368, while the sum is 38.

The square root of 2188919 is about 1479.4995775599. The cubic root of 2188919 is about 129.8404156187.

The spelling of 2188919 in words is "two million, one hundred eighty-eight thousand, nine hundred nineteen".