1188979 has 4 divisors (see below), whose sum is σ = 1297080. Its totient is φ = 1080880.

The previous prime is 1188977. The next prime is 1188991. The reversal of 1188979 is 9798811.

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

It is a cyclic number.

It is not a de Polignac number, because 1188979 - 2¹ = 1188977 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1188973) 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, 54034 + ... + 54055.

It is an arithmetic number, because the mean of its divisors is an integer number (324270).

2^1188979 is an apocalyptic number.

1188979 is a deficient number, since it is larger than the sum of its proper divisors (108101).

1188979 is a wasteful number, since it uses less digits than its factorization.

1188979 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 108100.

The product of its digits is 36288, while the sum is 43.

The square root of 1188979 is about 1090.4031364592. The cubic root of 1188979 is about 105.9395347573.

The spelling of 1188979 in words is "one million, one hundred eighty-eight thousand, nine hundred seventy-nine".