161507117 has 8 divisors (see below), whose sum is σ = 167596032. Its totient is φ = 155473200.

The previous prime is 161507113. The next prime is 161507141. The reversal of 161507117 is 711705161.

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

It is a cyclic number.

It is not a de Polignac number, because 161507117 - 2² = 161507113 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 161507117.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161507111) 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 in 7 ways as a sum of consecutive naturals, for example, 7718 + ... + 19559.

It is an arithmetic number, because the mean of its divisors is an integer number (20949504).

Almost surely, 2^161507117 is an apocalyptic number.

It is an amenable number.

161507117 is a deficient number, since it is larger than the sum of its proper divisors (6088915).

161507117 is a wasteful number, since it uses less digits than its factorization.

161507117 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27499.

The product of its (nonzero) digits is 1470, while the sum is 29.

The square root of 161507117 is about 12708.5450386738. The cubic root of 161507117 is about 544.5827595164.

The spelling of 161507117 in words is "one hundred sixty-one million, five hundred seven thousand, one hundred seventeen".