1219196889 has 27 divisors (see below), whose sum is σ = 1794202527. Its totient is φ = 797783616.

The previous prime is 1219196863. The next prime is 1219196897. The reversal of 1219196889 is 9886919121.

The square root of 1219196889 is 34917.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 21483225 + 1197713664 = 4635^2 + 34608^2 .

It is not a de Polignac number, because 1219196889 - 2⁷ = 1219196761 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1219196819) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 10789297 + ... + 10789409.

Almost surely, 2^1219196889 is an apocalyptic number.

1219196889 is the 34917-th square number.

1219196889 is the 17459-th centered octagonal number.

It is an amenable number.

1219196889 is a deficient number, since it is larger than the sum of its proper divisors (575005638).

1219196889 is an equidigital number, since it uses as much as digits as its factorization.

1219196889 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 438 (or 219 counting only the distinct ones).

The product of its digits is 559872, while the sum is 54.

The cubic root of 1219196889 is about 1068.2952120200.

The spelling of 1219196889 in words is "one billion, two hundred nineteen million, one hundred ninety-six thousand, eight hundred eighty-nine".