819000089 has 2 divisors, whose sum is σ = 819000090. Its totient is φ = 819000088.

The previous prime is 819000053. The next prime is 819000101. The reversal of 819000089 is 980000918.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 722803225 + 96196864 = 26885^2 + 9808^2 .

It is a cyclic number.

It is not a de Polignac number, because 819000089 - 2¹⁶ = 818934553 is a prime.

It is a super-2 number, since 2×819000089² = 1341522291564015842, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (819000289) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 409500044 + 409500045.

It is an arithmetic number, because the mean of its divisors is an integer number (409500045).

Almost surely, 2^819000089 is an apocalyptic number.

It is an amenable number.

819000089 is a deficient number, since it is larger than the sum of its proper divisors (1).

819000089 is an equidigital number, since it uses as much as digits as its factorization.

819000089 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5184, while the sum is 35.

The square root of 819000089 is about 28618.1775974642. The cubic root of 819000089 is about 935.6095576258.

The spelling of 819000089 in words is "eight hundred nineteen million, eighty-nine", and thus it is an aban number.