1198090889 has 4 divisors (see below), whose sum is σ = 1227312660. Its totient is φ = 1168869120.

The previous prime is 1198090879. The next prime is 1198090919. The reversal of 1198090889 is 9880908911.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 225150025 + 972940864 = 15005^2 + 31192^2 .

It is a cyclic number.

It is not a de Polignac number, because 1198090889 - 2¹² = 1198086793 is a prime.

It is a super-3 number, since 3×1198090889³ (a number of 28 digits) contains 333 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 1198090889.

It is not an unprimeable number, because it can be changed into a prime (1198090879) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14610824 + ... + 14610905.

It is an arithmetic number, because the mean of its divisors is an integer number (306828165).

Almost surely, 2^1198090889 is an apocalyptic number.

It is an amenable number.

1198090889 is a deficient number, since it is larger than the sum of its proper divisors (29221771).

1198090889 is an equidigital number, since it uses as much as digits as its factorization.

1198090889 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29221770.

The product of its (nonzero) digits is 373248, while the sum is 53.

The square root of 1198090889 is about 34613.4495391604. The cubic root of 1198090889 is about 1062.0947330798.

The spelling of 1198090889 in words is "one billion, one hundred ninety-eight million, ninety thousand, eight hundred eighty-nine".