1988219 has 2 divisors, whose sum is σ = 1988220. Its totient is φ = 1988218.

The previous prime is 1988197. The next prime is 1988221. The reversal of 1988219 is 9128891.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1988219 - 2¹² = 1984123 is a prime.

It is a super-2 number, since 2×1988219² = 7906029583922, which contains 22 as substring.

It is a Sophie Germain prime.

Together with 1988221, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (1988249) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 994109 + 994110.

It is an arithmetic number, because the mean of its divisors is an integer number (994110).

2^1988219 is an apocalyptic number.

1988219 is a deficient number, since it is larger than the sum of its proper divisors (1).

1988219 is an equidigital number, since it uses as much as digits as its factorization.

1988219 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 1988219 is about 1410.0421979501. The cubic root of 1988219 is about 125.7442321541.

The spelling of 1988219 in words is "one million, nine hundred eighty-eight thousand, two hundred nineteen".