1117661191 has 8 divisors (see below), whose sum is σ = 1148832720. Its totient is φ = 1086863232.

The previous prime is 1117661147. The next prime is 1117661201. The reversal of 1117661191 is 1911667111.

It is a happy number.

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 1117661191 - 2¹¹ = 1117659143 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 (1117661101) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 87321 + ... + 99298.

It is an arithmetic number, because the mean of its divisors is an integer number (143604090).

Almost surely, 2^1117661191 is an apocalyptic number.

1117661191 is a deficient number, since it is larger than the sum of its proper divisors (31171529).

1117661191 is a wasteful number, since it uses less digits than its factorization.

1117661191 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 186785.

The product of its digits is 2268, while the sum is 34.

The square root of 1117661191 is about 33431.4401574326. The cubic root of 1117661191 is about 1037.7754444739.

The spelling of 1117661191 in words is "one billion, one hundred seventeen million, six hundred sixty-one thousand, one hundred ninety-one".