1198913489 has 4 divisors (see below), whose sum is σ = 1201355760. Its totient is φ = 1196471220.

The previous prime is 1198913483. The next prime is 1198913497. The reversal of 1198913489 is 9843198911.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1198913489 - 2⁴ = 1198913473 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1198913489.

It is not an unprimeable number, because it can be changed into a prime (1198913483) 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, 1220399 + ... + 1221380.

It is an arithmetic number, because the mean of its divisors is an integer number (300338940).

Almost surely, 2^1198913489 is an apocalyptic number.

It is an amenable number.

1198913489 is a deficient number, since it is larger than the sum of its proper divisors (2442271).

1198913489 is an equidigital number, since it uses as much as digits as its factorization.

1198913489 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2442270.

The product of its digits is 559872, while the sum is 53.

The square root of 1198913489 is about 34625.3301644909. The cubic root of 1198913489 is about 1062.3377528311.

The spelling of 1198913489 in words is "one billion, one hundred ninety-eight million, nine hundred thirteen thousand, four hundred eighty-nine".