219190889 has 2 divisors, whose sum is σ = 219190890. Its totient is φ = 219190888.

The previous prime is 219190883. The next prime is 219190913. The reversal of 219190889 is 988091912.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 182709289 + 36481600 = 13517^2 + 6040^2 .

It is a cyclic number.

It is not a de Polignac number, because 219190889 - 2²⁰ = 218142313 is a prime.

It is a super-2 number, since 2×219190889² = 96089291641220642, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (219190883) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 109595444 + 109595445.

It is an arithmetic number, because the mean of its divisors is an integer number (109595445).

Almost surely, 2^219190889 is an apocalyptic number.

It is an amenable number.

219190889 is a deficient number, since it is larger than the sum of its proper divisors (1).

219190889 is an equidigital number, since it uses as much as digits as its factorization.

219190889 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 93312, while the sum is 47.

The square root of 219190889 is about 14805.0967237637. The cubic root of 219190889 is about 602.9400963752.

The spelling of 219190889 in words is "two hundred nineteen million, one hundred ninety thousand, eight hundred eighty-nine".