1161117207 has 16 divisors (see below), whose sum is σ = 1731136480. Its totient is φ = 769144896.

The previous prime is 1161117203. The next prime is 1161117259. The reversal of 1161117207 is 7027111611.

1161117207 is a `hidden beast` number, since 11 + 611 + 17 + 20 + 7 = 666.

It is not a de Polignac number, because 1161117207 - 2² = 1161117203 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1161117203) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 132718 + ... + 141195.

It is an arithmetic number, because the mean of its divisors is an integer number (108196030).

Almost surely, 2^1161117207 is an apocalyptic number.

1161117207 is a deficient number, since it is larger than the sum of its proper divisors (570019273).

1161117207 is a wasteful number, since it uses less digits than its factorization.

1161117207 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 274079 (or 274073 counting only the distinct ones).

The product of its (nonzero) digits is 588, while the sum is 27.

The square root of 1161117207 is about 34075.1699482189. The cubic root of 1161117207 is about 1051.0547849514.

Adding to 1161117207 its reverse (7027111611), we get a palindrome (8188228818).

The spelling of 1161117207 in words is "one billion, one hundred sixty-one million, one hundred seventeen thousand, two hundred seven".