117216137 has 4 divisors (see below), whose sum is σ = 117258960. Its totient is φ = 117173316.

The previous prime is 117216109. The next prime is 117216157. The reversal of 117216137 is 731612711.

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 117216137 - 2¹⁰ = 117215113 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (117216107) 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, 17003 + ... + 22880.

It is an arithmetic number, because the mean of its divisors is an integer number (29314740).

Almost surely, 2^117216137 is an apocalyptic number.

It is an amenable number.

117216137 is a deficient number, since it is larger than the sum of its proper divisors (42823).

117216137 is an equidigital number, since it uses as much as digits as its factorization.

117216137 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42822.

The product of its digits is 1764, while the sum is 29.

The square root of 117216137 is about 10826.6401528821. The cubic root of 117216137 is about 489.3983132559.

Adding to 117216137 its reverse (731612711), we get a palindrome (848828848).

The spelling of 117216137 in words is "one hundred seventeen million, two hundred sixteen thousand, one hundred thirty-seven".