117218147 has 2 divisors, whose sum is σ = 117218148. Its totient is φ = 117218146.

The previous prime is 117218137. The next prime is 117218197. The reversal of 117218147 is 741812711.

It is a weak prime.

It is an emirp because it is prime and its reverse (741812711) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 117218147 - 2⁶ = 117218083 is a prime.

It is a super-2 number, since 2×117218147² = 27480187972227218, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (117218107) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 58609073 + 58609074.

It is an arithmetic number, because the mean of its divisors is an integer number (58609074).

Almost surely, 2^117218147 is an apocalyptic number.

117218147 is a deficient number, since it is larger than the sum of its proper divisors (1).

117218147 is an equidigital number, since it uses as much as digits as its factorization.

117218147 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3136, while the sum is 32.

The square root of 117218147 is about 10826.7329790662. The cubic root of 117218147 is about 489.4011106096.

The spelling of 117218147 in words is "one hundred seventeen million, two hundred eighteen thousand, one hundred forty-seven".