1172345117 has 4 divisors (see below), whose sum is σ = 1172624640. Its totient is φ = 1172065596.

The previous prime is 1172345093. The next prime is 1172345129. The reversal of 1172345117 is 7115432711.

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.

It is a cyclic number.

It is not a de Polignac number, because 1172345117 - 2¹⁰ = 1172344093 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 (1172345147) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 133373 + ... + 141890.

It is an arithmetic number, because the mean of its divisors is an integer number (293156160).

Almost surely, 2^1172345117 is an apocalyptic number.

It is an amenable number.

1172345117 is a deficient number, since it is larger than the sum of its proper divisors (279523).

1172345117 is an equidigital number, since it uses as much as digits as its factorization.

1172345117 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 279522.

The product of its digits is 5880, while the sum is 32.

The square root of 1172345117 is about 34239.5256538405. The cubic root of 1172345117 is about 1054.4317948356.

Adding to 1172345117 its reverse (7115432711), we get a palindrome (8287777828).

The spelling of 1172345117 in words is "one billion, one hundred seventy-two million, three hundred forty-five thousand, one hundred seventeen".