117845709 has 8 divisors (see below), whose sum is σ = 157281600. Its totient is φ = 78486816.

The previous prime is 117845681. The next prime is 117845719. The reversal of 117845709 is 907548711.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 117845709 - 2⁹ = 117845197 is a prime.

It is a super-2 number, since 2×117845709² = 27775222259425362, which contains 22 as substring.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (117845719) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15577 + ... + 21870.

It is an arithmetic number, because the mean of its divisors is an integer number (19660200).

Almost surely, 2^117845709 is an apocalyptic number.

It is an amenable number.

117845709 is a deficient number, since it is larger than the sum of its proper divisors (39435891).

117845709 is a wasteful number, since it uses less digits than its factorization.

117845709 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38499.

The product of its (nonzero) digits is 70560, while the sum is 42.

The square root of 117845709 is about 10855.6763492654. The cubic root of 117845709 is about 490.2729410930.

The spelling of 117845709 in words is "one hundred seventeen million, eight hundred forty-five thousand, seven hundred nine".