161929943 has 8 divisors (see below), whose sum is σ = 185191200. Its totient is φ = 138700800.

The previous prime is 161929931. The next prime is 161929949. The reversal of 161929943 is 349929161.

It is a happy number.

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

It is not a de Polignac number, because 161929943 - 2⁴ = 161929927 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 161929894 and 161929903.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161929949) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3983 + ... + 18431.

It is an arithmetic number, because the mean of its divisors is an integer number (23148900).

Almost surely, 2^161929943 is an apocalyptic number.

161929943 is a deficient number, since it is larger than the sum of its proper divisors (23261257).

161929943 is a wasteful number, since it uses less digits than its factorization.

161929943 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16057.

The product of its digits is 104976, while the sum is 44.

The square root of 161929943 is about 12725.1696648807. The cubic root of 161929943 is about 545.0575850272.

The spelling of 161929943 in words is "one hundred sixty-one million, nine hundred twenty-nine thousand, nine hundred forty-three".