161711793 has 48 divisors (see below), whose sum is σ = 257275200. Its totient is φ = 97511040.

The previous prime is 161711747. The next prime is 161711813. The reversal of 161711793 is 397117161.

It is not a de Polignac number, because 161711793 - 2¹² = 161707697 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (161711393) 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 47 ways as a sum of consecutive naturals, for example, 385738 + ... + 386156.

It is an arithmetic number, because the mean of its divisors is an integer number (5359900).

Almost surely, 2^161711793 is an apocalyptic number.

It is an amenable number.

161711793 is a deficient number, since it is larger than the sum of its proper divisors (95563407).

161711793 is a wasteful number, since it uses less digits than its factorization.

161711793 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 542 (or 539 counting only the distinct ones).

The product of its digits is 7938, while the sum is 36.

The square root of 161711793 is about 12716.5951811010. The cubic root of 161711793 is about 544.8127101028.

The spelling of 161711793 in words is "one hundred sixty-one million, seven hundred eleven thousand, seven hundred ninety-three".