1180356109 has 4 divisors (see below), whose sum is σ = 1180802016. Its totient is φ = 1179910204.

The previous prime is 1180356013. The next prime is 1180356131. The reversal of 1180356109 is 9016530811.

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, and also an emirpimes, since its reverse is a distinct semiprime: 9016530811 = 47279 ⋅190709.

It is a cyclic number.

It is not a de Polignac number, because 1180356109 - 2¹⁵ = 1180323341 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 (1180356409) 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, 218959 + ... + 224284.

It is an arithmetic number, because the mean of its divisors is an integer number (295200504).

Almost surely, 2^1180356109 is an apocalyptic number.

It is an amenable number.

1180356109 is a deficient number, since it is larger than the sum of its proper divisors (445907).

1180356109 is an equidigital number, since it uses as much as digits as its factorization.

1180356109 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 445906.

The product of its (nonzero) digits is 6480, while the sum is 34.

The square root of 1180356109 is about 34356.3110505188. The cubic root of 1180356109 is about 1056.8280963030.

The spelling of 1180356109 in words is "one billion, one hundred eighty million, three hundred fifty-six thousand, one hundred nine".