161117709 has 8 divisors (see below), whose sum is σ = 214892160. Its totient is φ = 107377536.

The previous prime is 161117699. The next prime is 161117717. The reversal of 161117709 is 907711161.

It is a happy number.

161117709 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 161117709 - 2⁷ = 161117581 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 161117709.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161117729) 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, 5884 + ... + 18890.

It is an arithmetic number, because the mean of its divisors is an integer number (26861520).

Almost surely, 2^161117709 is an apocalyptic number.

It is an amenable number.

161117709 is a deficient number, since it is larger than the sum of its proper divisors (53774451).

161117709 is a wasteful number, since it uses less digits than its factorization.

161117709 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17139.

The product of its (nonzero) digits is 2646, while the sum is 33.

The square root of 161117709 is about 12693.2150773553. The cubic root of 161117709 is about 544.1447281537.

The spelling of 161117709 in words is "one hundred sixty-one million, one hundred seventeen thousand, seven hundred nine".