117252809 has 4 divisors (see below), whose sum is σ = 117765060. Its totient is φ = 116740560.

The previous prime is 117252803. The next prime is 117252851. The reversal of 117252809 is 908252711.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 109662784 + 7590025 = 10472^2 + 2755^2 .

It is a cyclic number.

It is not a de Polignac number, because 117252809 - 2¹² = 117248713 is a prime.

It is a super-3 number, since 3×117252809³ (a number of 25 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (117252803) 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, 255782 + ... + 256239.

It is an arithmetic number, because the mean of its divisors is an integer number (29441265).

Almost surely, 2^117252809 is an apocalyptic number.

It is an amenable number.

117252809 is a deficient number, since it is larger than the sum of its proper divisors (512251).

117252809 is an equidigital number, since it uses as much as digits as its factorization.

117252809 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 512250.

The product of its (nonzero) digits is 10080, while the sum is 35.

The square root of 117252809 is about 10828.3336206454. Note that the first 3 decimals coincide. The cubic root of 117252809 is about 489.4493453182.

The spelling of 117252809 in words is "one hundred seventeen million, two hundred fifty-two thousand, eight hundred nine".