117211247 has 4 divisors (see below), whose sum is σ = 123380280. Its totient is φ = 111042216.

The previous prime is 117211231. The next prime is 117211267. The reversal of 117211247 is 742112711.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 742112711 = 83 ⋅8941117.

It is a cyclic number.

It is not a de Polignac number, because 117211247 - 2⁴ = 117211231 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 (117211267) 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, 3084488 + ... + 3084525.

It is an arithmetic number, because the mean of its divisors is an integer number (30845070).

Almost surely, 2^117211247 is an apocalyptic number.

117211247 is a deficient number, since it is larger than the sum of its proper divisors (6169033).

117211247 is an equidigital number, since it uses as much as digits as its factorization.

117211247 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6169032.

The product of its digits is 784, while the sum is 26.

The square root of 117211247 is about 10826.4143186930. The cubic root of 117211247 is about 489.3915076201.

Adding to 117211247 its reverse (742112711), we get a palindrome (859323958).

The spelling of 117211247 in words is "one hundred seventeen million, two hundred eleven thousand, two hundred forty-seven".