117571109 has 2 divisors, whose sum is σ = 117571110. Its totient is φ = 117571108.

The previous prime is 117571093. The next prime is 117571123. The reversal of 117571109 is 901175711.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 95452900 + 22118209 = 9770^2 + 4703^2 .

It is a cyclic number.

It is not a de Polignac number, because 117571109 - 2⁴ = 117571093 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (117571169) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 58785554 + 58785555.

It is an arithmetic number, because the mean of its divisors is an integer number (58785555).

Almost surely, 2^117571109 is an apocalyptic number.

It is an amenable number.

117571109 is a deficient number, since it is larger than the sum of its proper divisors (1).

117571109 is an equidigital number, since it uses as much as digits as its factorization.

117571109 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2205, while the sum is 32.

The square root of 117571109 is about 10843.0212118210. The cubic root of 117571109 is about 489.8918392393.

The spelling of 117571109 in words is "one hundred seventeen million, five hundred seventy-one thousand, one hundred nine".