1181993 has 8 divisors (see below), whose sum is σ = 1306368. Its totient is φ = 1063744.

The previous prime is 1181987. The next prime is 1182007. The reversal of 1181993 is 3991811.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1181993 - 2²⁰ = 133417 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1181923) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1121 + ... + 1902.

It is an arithmetic number, because the mean of its divisors is an integer number (163296).

2^1181993 is an apocalyptic number.

It is an amenable number.

1181993 is a deficient number, since it is larger than the sum of its proper divisors (124375).

1181993 is a wasteful number, since it uses less digits than its factorization.

1181993 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3063.

The product of its digits is 1944, while the sum is 32.

The square root of 1181993 is about 1087.1950147053. The cubic root of 1181993 is about 105.7316399038.

The spelling of 1181993 in words is "one million, one hundred eighty-one thousand, nine hundred ninety-three".