1198969 has 4 divisors (see below), whose sum is σ = 1226896. Its totient is φ = 1171044.

The previous prime is 1198949. The next prime is 1198973. The reversal of 1198969 is 9698911.

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 a de Polignac number, because none of the positive numbers 2^k-1198969 is a prime.

It is a super-2 number, since 2×1198969² = 2875053325922, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (43), and also a Moran number because the ratio is a prime number: 27883 = 1198969 / (1 + 1 + 9 + 8 + 9 + 6 + 9).

It is an Ulam number.

It is a Duffinian number.

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

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13899 + ... + 13984.

It is an arithmetic number, because the mean of its divisors is an integer number (306724).

2^1198969 is an apocalyptic number.

It is an amenable number.

1198969 is a deficient number, since it is larger than the sum of its proper divisors (27927).

1198969 is an equidigital number, since it uses as much as digits as its factorization.

1198969 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27926.

The product of its digits is 34992, while the sum is 43.

The square root of 1198969 is about 1094.9744289252. The cubic root of 1198969 is about 106.2354148376.

Subtracting from 1198969 its sum of digits (43), we obtain a triangular number (1198926 = T₁₅₄₈).

The spelling of 1198969 in words is "one million, one hundred ninety-eight thousand, nine hundred sixty-nine".