117505571 has 2 divisors, whose sum is σ = 117505572. Its totient is φ = 117505570.

The previous prime is 117505561. The next prime is 117505573. The reversal of 117505571 is 175505711.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 117505571 - 2¹⁰ = 117504547 is a prime.

Together with 117505573, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (117505573) 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 as a sum of consecutive naturals, namely, 58752785 + 58752786.

It is an arithmetic number, because the mean of its divisors is an integer number (58752786).

Almost surely, 2^117505571 is an apocalyptic number.

117505571 is a deficient number, since it is larger than the sum of its proper divisors (1).

117505571 is an equidigital number, since it uses as much as digits as its factorization.

117505571 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6125, while the sum is 32.

The square root of 117505571 is about 10839.9986623615. The cubic root of 117505571 is about 489.8007950499.

The spelling of 117505571 in words is "one hundred seventeen million, five hundred five thousand, five hundred seventy-one".