117191719 has 2 divisors, whose sum is σ = 117191720. Its totient is φ = 117191718.

The previous prime is 117191713. The next prime is 117191731. The reversal of 117191719 is 917191711.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-117191719 is a prime.

It is a super-2 number, since 2×117191719² = 27467798004349922, which contains 22 as substring.

It is equal to p_6690736 and since 117191719 and 6690736 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (117191713) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 58595859 + 58595860.

It is an arithmetic number, because the mean of its divisors is an integer number (58595860).

Almost surely, 2^117191719 is an apocalyptic number.

117191719 is a deficient number, since it is larger than the sum of its proper divisors (1).

117191719 is an equidigital number, since it uses as much as digits as its factorization.

117191719 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3969, while the sum is 37.

The square root of 117191719 is about 10825.5124128145. The cubic root of 117191719 is about 489.3643277251.

The spelling of 117191719 in words is "one hundred seventeen million, one hundred ninety-one thousand, seven hundred nineteen".