1181179117 has 4 divisors (see below), whose sum is σ = 1182555040. Its totient is φ = 1179803196.

The previous prime is 1181179073. The next prime is 1181179141. The reversal of 1181179117 is 7119711811.

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: 7119711811 = 1033 ⋅6892267.

It is a cyclic number.

It is not a de Polignac number, because 1181179117 - 2¹⁹ = 1180654829 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 (1181170117) 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, 686673 + ... + 688390.

It is an arithmetic number, because the mean of its divisors is an integer number (295638760).

Almost surely, 2^1181179117 is an apocalyptic number.

It is an amenable number.

1181179117 is a deficient number, since it is larger than the sum of its proper divisors (1375923).

1181179117 is an equidigital number, since it uses as much as digits as its factorization.

1181179117 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1375922.

The product of its digits is 3528, while the sum is 37.

The square root of 1181179117 is about 34368.2865007844. The cubic root of 1181179117 is about 1057.0736651042.

The spelling of 1181179117 in words is "one billion, one hundred eighty-one million, one hundred seventy-nine thousand, one hundred seventeen".