1198989 has 24 divisors (see below), whose sum is σ = 1957760. Its totient is φ = 724680.

The previous prime is 1198979. The next prime is 1198991. The reversal of 1198989 is 9898911.

It is not a de Polignac number, because 1198989 - 2⁴ = 1198973 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1198949) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3084 + ... + 3450.

2^1198989 is an apocalyptic number.

It is an amenable number.

1198989 is a deficient number, since it is larger than the sum of its proper divisors (758771).

1198989 is a wasteful number, since it uses less digits than its factorization.

1198989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 398 (or 381 counting only the distinct ones).

The product of its digits is 46656, while the sum is 45.

The square root of 1198989 is about 1094.9835615204. The cubic root of 1198989 is about 106.2360055386.

It can be divided in two parts, 1198 and 989, that added together give a 7-th power (2187 = 3⁷).

The spelling of 1198989 in words is "one million, one hundred ninety-eight thousand, nine hundred eighty-nine".